Same Team, Same Car… So Why Do F1 Teammates Run Different Set-Ups?

F1 teammate set-up differences get read as favouritism more often than they get explained. Two cars entered by the same team and built around the same underlying design can leave the garage with different wing angles, ride heights and differential maps, sometimes with different parts bolted on entirely. McLaren’s Hungary weekend put that on full display: Lando Norris ran a new floor all Friday, Oscar Piastri and reserve driver Leonardo Fornaroli both ran the old one specifically so the team could compare them side by side. Set-up is not specification. The 2026 rules make that distinction matter more than ever, while the cost cap, production capacity and testing programme all shape when each car gets a new part.

Key Points: F1 teammate set-up differences

• Two separate things get lumped together as “a different car”: mechanical and software set-up, and physical specification. They are not the same thing
• A driver describes behaviour and agrees changes with the race engineer. Mechanics and systems engineers implement the configuration. The driver does not personally redesign the car
• The 2026 rules add adjustable front and rear aerodynamics operating through cornering and straight-line modes, plus power-unit deployment limits set by the FIA in advance of each event, so the operating window changes from track to track
• Parc fermé locks specification and set-up from the moment a car first leaves the pits in qualifying. Suspension set-up sheets are submitted before that. Front-wing adjustment is one of the few permitted exceptions once inside it
• The $215 million cost cap doesn’t stop a team building two of a new part, but it does force a choice over which one gets made first. Manufacturing lead time, crash-damage stock and freight deadlines shape that choice just as much as budget does
• McLaren ran exactly this at the Hungarian Grand Prix: Norris on the new floor all Friday, Piastri and reserve driver Leonardo Fornaroli on the old one for direct comparison data, both cars converging on the new specification for Saturday

Set-Up Is Not Specification

“Different set-up” gets used as a catch-all whenever two teammates look unalike on a Friday timesheet. It is not accurate, and it flattens three separate layers into one lazy phrase.

The first layer is physical specification. A new floor, a new wing, a new brake duct changes what the car is. The second is driver set-up: wing angle, ride height, differential maps, brake balance, all tuning the same physical car to suit a driver and a circuit. The third, new for 2026, sits between the two. Front and rear bodywork now moves between cornering and straight-line modes, activated through the standard electronics but only within FIA-defined zones and conditions, not freely adjustable the way brake balance is. Low-grip sessions can restrict how much of it a driver gets to use at all.

Two questions do most of the work here: why are the physical cars different, and why are the available cars adjusted differently. The answer to the first is usually production, timing or testing. The answer to the second normally begins with the driver, but also reflects the circuit, the tyres and the intended run programme.

What A Driver Changes

The driver doesn’t redesign anything. Three different kinds of change sit inside what gets called “set-up,” and separating them is the whole point of this section.

The physical changes happen in the garage: front-wing flap angle, static ride height, spring and damper rates, anti-roll bar configuration, camber, toe, brake-duct and cooling bodywork. The driver describes what the car is doing, agrees a direction with the race engineer, and the mechanics physically change the part. The driver doesn’t touch a spanner. Front-wing angle is the quickest of these to see. Adding load shifts the car’s aerodynamic balance forwards, which can cut entry and mid-corner understeer, but it can also destabilise the rear, because the rear axle now carries a smaller share of the car’s total aerodynamic load. Front and rear ride height sit underneath most of it: they set the static aerodynamic platform, how close the floor runs to bottoming, and how much suspension travel is left over kerbs. The front-to-rear balance still matters, but how much depends on the specific car, not on a fixed rule that applied to the old ground-effect generation.

Underneath that sit the settings calibrated electronically before the car ever leaves the garage: differential behaviour through entry, mid-corner and exit, engine braking, brake migration, torque delivery, and where energy gets harvested and saved across a lap. Engineers prepare these maps, some of them within limits the FIA sets per event, and hand the driver a set of approved options rather than a blank sheet.

What the driver operates live from the cockpit is the third layer: brake balance, permitted differential and engine-braking selections, energy-management modes, overtaking functions, and activation of the adjustable-aero system where available. Energy delivery itself is heavily governed by software, regulatory limits and pre-programmed strategy rather than manually chosen megajoule by megajoule.

That framework has already changed during 2026. The FIA maintained 350kW of MGU-K deployment in key acceleration zones while limiting it to 250kW elsewhere on the lap. It’s not just a software footnote: how much power a driver can put down out of a corner changes rear tyre degradation and corner-exit traction demands, which feeds straight back into the mechanical balance choices in the first layer above. Teams optimise their strategy inside a changing set of limits. They do not work from one fixed FIA map.

None of it sits in isolation. Change the ride height and the diff map that worked yesterday might not work today. Two drivers can be handed identical hardware and still need it tuned in opposite directions, because how hard they brake, how they rotate the car and how much instability they can drive around are all different starting points. Specification sits outside all three layers. A new floor, wing or brake duct isn’t a set-up choice at all. It’s a different physical part on the car.

Why Two Drivers Need A Different Balance

A late, hard braker carrying brake deep into the corner usually wants more rear stability on entry than a driver who releases earlier and trusts minimum speed instead. Some drivers rotate the car through trail braking, others through steering input or throttle timing, and the differential, brake migration and roll balance that suit one method won’t automatically suit the other.

Confidence is not a soft factor here either. It shows up in braking points, throttle traces, corrections and lap-to-lap variance, all things a race engineer can measure. A driver who trusts the rear axle will commit earlier and carry more speed than one working around a car they don’t fully believe, even if the simulation says the sharper set-up is faster in isolation. And what wins qualifying doesn’t always win a race. A car sharpened for one lap on fresh tyres and low fuel is a different tool to one that needs to survive a full stint, dirty air and a degrading tyre.

The 2026 Layer: Adjustable Aero, Energy Limits And Parc Fermé

The 2026 rules didn’t remove the old mechanical toolkit, they built a new layer on top of it. Front and rear bodywork now moves between cornering and straight-line modes, activated through the standard electronics and permitted only within zones and conditions the FIA sets, not freely adjustable in the way brake balance is. The FIA publishes those activation zones ahead of every event alongside maximum permitted power-unit deployment limits, so the operating window changes from track to track. Teams still do the work of optimising harvesting and deployment strategy within those limits. The FIA sets the ceiling. It doesn’t write the map.

The passive mechanical platform hasn’t gone anywhere. Self-levelling ride height and any event-triggered change to suspension characteristics are banned outright, which keeps the pre-set static platform just as important as it’s always been. What has changed is when teams get to touch any of it. Parc fermé begins the moment a car first leaves the pit lane in qualifying, or Sprint Qualifying where it applies, and suspension set-up sheets have to be submitted before that exit. Once inside parc fermé, specification and set-up are locked down hard. Front-wing adjustment is one of the few things still permitted.

There’s also a specific escape hatch worth knowing about. Under the current sporting regulations, limited previously used alternative-specification aerodynamic components may be fitted in defined parc fermé circumstances, subject to FIA approval. It exists for exactly the situation where damage or a parts shortage forces a fallback, not as a loophole for swapping strategy mid-weekend.

The Cost Cap Squeeze

The 2026 team cost cap sits at $215 million for a season of 24 competitions or fewer, and FIA financial regulations director Federico Lodi has been on record explaining where the jump from the old $135 million figure comes from: accumulated inflation since 2021, plus a batch of costs, capital investment and HR among them, that used to sit outside the cap and now sit inside it. The headline number is higher, but that doesn’t translate into an equivalent increase in development spending. Inflation and newly-included costs account for a chunk of the rise, rather than representing a matching increase in money available for car development.

Nothing about the cap forbids a team building two identical examples of a new floor at once. It forces a choice instead. Design, manufacturing, tooling and the development work behind a new part all draw on the same capped pool of resources, though exactly how each cost is treated depends on its category. Every part competes with every other part for the same design hours, wind-tunnel and CFD time, and production capacity.

A team may complete one race-ready example before the second, either because of production timing or because it wants an immediate track comparison. It may also deliberately hold the previous specification on one car even when two new examples exist. Teams must also decide how much reserve stock they’re prepared to carry: producing only enough parts for the two race cars, with no replacement available after damage, creates an obvious operational risk. Freight deadlines and factory throughput can decide which driver gets the first example, which isn’t the same thing as preferential treatment. And a part introduced late in the season has less time to earn back what it cost, particularly if it carries no value into the following year’s rules.

What public reporting almost never reveals is the cost of a specific upgrade or how many examples were built. Anyone reporting a one-car rollout as proof of a budget shortfall is filling in a gap the team hasn’t confirmed.

McLaren’s Hungary Floor, In Practice

Hungary gave a clean, current example of all of this happening on the same Friday. Norris ran McLaren’s new floor package across both sessions. Piastri didn’t get near it in FP1 at all, sitting the session out for reserve driver Leonardo Fornaroli’s mandatory rookie outing, then climbing into FP2 straight onto the old-specification floor so the team could run a direct cross-car comparison. Fornaroli had also run the old floor in FP1. Piastri finished FP2 eighth and nearly a second off Norris’s third-fastest time, but the times weren’t a clean driver comparison. He’d missed FP1, was running the previous floor specification, and was doing the comparative work McLaren needed before committing both cars to the upgrade.

McLaren confirmed the new floor performed as expected against simulation, which is a narrower claim than it sounds. It means the measured aerodynamic effect matched the model, not that the car had banked the full predicted lap time in one weekend. Both cars moved onto the new floor specification for Saturday once that correlation was established.

McLaren didn’t just put both drivers on the new floor and be done with it, because a same-session old-versus-new comparison controls more variables than comparing data from different weekends would. Both cars run at the same circuit, within a much narrower window of track temperature, wind, tyre allocation and surface condition than two separate sessions would give. That gives the team a stronger basis for comparing pressure distributions, ride-height behaviour and lap-time trends against simulation, rather than guessing how much of a gap came from the part and how much came from conditions changing between sessions. It’s still never perfectly like-for-like. Drivers are different, run plans differ, traffic differs, tyre condition differs, and one driver may have missed earlier running entirely. But it’s the strongest comparison a team can get with real data instead of a model, and that’s what Piastri’s Friday was.

There’s a separate advantage worth naming plainly, because it’s real and it has nothing to do with favouritism. Norris had two full sessions to build reference points on the new floor: where it changed his braking, where the balance shifted mid-corner, what he could now ask of the car that he couldn’t before. Piastri got none of that until Saturday. More laps on a part is an advantage in itself, independent of whatever the part is worth, and it’s a genuine reason a timesheet can look lopsided on a Friday even once everyone’s back on equal specification.

A planned engineering comparison, Piastri’s missed FP1, and the need to validate a multi-part package before standardising it across the garage: three separate things, none of them a statement about which driver McLaren rates higher.

Coffee Corner Take

Every time a teammate turns up a tenth or two off the pace with a part the other car doesn’t have, the same conclusion gets reached for them before anyone’s checked what happened. Favouritism. It’s the laziest read available and it’s usually wrong.

An F1 car in 2026 is an aerodynamic, mechanical, thermal and electrical system all fighting for the same lap time, tuned around adjustable aerodynamics and energy limits that shift from circuit to circuit, inside a cost cap that punishes building everything twice without a reason. Split-spec testing is what a well-run development programme looks like under those constraints, not a symptom of a team playing favourites.

Piastri lost FP1 to a rookie requirement he had no control over, with Fornaroli taking his car and running the old floor. Piastri then spent his only session on the same specification, giving McLaren comparison data it could not have collected with both drivers on the new part. By Saturday, both cars were on the same floor and the question of who’d been treated better had already answered itself.

Worth remembering next time a Friday timesheet looks lopsided. Different set-up can be entirely driver-led. Different specification usually comes down to testing, production timing, parts availability or budget. Neither one, on its own, tells you anything about who a team backs.