S1 Class Cars in Forza Horizon 6 — Complete Tier List & Tuning Guide
PI Range: 801-900
S1 is supercar territory. 600-800 horsepower, carbon fiber everything, active aero, lap times that'd embarrass actual race cars from a decade ago. This is the class most people jump into first when they pick up FH6, and it's also where the AI difficulty spike slaps you in the face. The AI drivers in S1 are genuinely quick. You can't just out-power them with a fat engine swap like you can in A class. You actually have to drive.
The FH6 physics hit S1 hard, in a good way. In FH5, S1 was dominated by AWD-swapped hypercars that could dump 1,000 hp through all four wheels with basically zero penalty. FH6's power-to-grip model means those same builds now understeer like a bus because all that power overwhelms the front tires. The meta has shifted toward lighter, more balanced cars that carry speed through corners instead of brute-forcing their way out of them. I honestly love this change. It rewards actual driving skill instead of just "big engine go brr."
S1 Class Meta Overview
S1 is the most expensive bracket to compete in, and it's the one where car choice matters most. Unlike lower classes where you can grab a cheap car and build it up with PI headroom, S1 cars are mostly purpose-built supercars that come within striking distance of S1900 straight from the factory. You typically only have 30-60 PI to play with, so you can't transform a car's character. You're refining what's already there.
The meta now favors mid-engine platforms with active aero. Hybrid systems — SF90, Revuelto, Artura — have a legit advantage because electric torque fill kills the turbo lag that plagues traditional twin-turbo V8s in this bracket. The SF90 Stradale is the current S1 king because its hybrid AWD system gives near-perfect traction without the understeer penalty of a traditional AWD conversion. I've put hundreds of laps into this car and it just doesn't have a weakness.
Top 5 S1 Class Cars
| Car | Stock PI | Best Track Type | Analysis |
|---|---|---|---|
| 2024 Ferrari SF90 Stradale | 856 | All circuits | Current S1 meta king and it's not particularly close. 986 hp hybrid V8 with AWD that actually rotates through corners instead of just pushing. 44 PI to S1900 gets you race tires. The FH6 physics reward its mid-engine balance — it's the only S1 car that's top-tier on both tight circuits and high-speed tracks. Expensive at 2.5M credits but honestly worth every CR. |
| 2025 Lamborghini Revuelto | 848 | Technical circuits | Closest competitor to the SF90. That V12 hybrid sounds absolutely incredible, and the rear-steer system gives it better rotation in tight corners. Slightly slower on straights because it's heavier and the AWD system is less power-efficient. 52 PI to work with. If you care about engine sound as much as lap times, this is your car. |
| 2023 Porsche 911 GT3 RS | 827 | High-speed circuits | 73 PI of headroom is massive for S1. 518 hp sounds low for the class but it only weighs 3,200 lbs and the active aero generates stupid amounts of downforce. Slap on race tires and a sport exhaust. Dominates tracks with fast sweepers where the aero keeps it glued at 180+ mph. The weakness: RWD with no hybrid assist means you lose 2-3 positions at every race start. Worth it though. |
| 2017 Ford GT | 831 | All-around | The dark horse nobody talks about. 647 hp, 3,054 lbs, active aero + track-focused chassis = handles like a GT3 race car. 69 PI to play with. The twin-turbo V6 doesn't sound great, I'll be honest, but the chassis balance is near-perfect. Underrated in the current meta — most people are sleeping on this thing and I don't know why. |
| 2025 McLaren Artura | 842 | Technical + mixed surface | Hybrid V6, 671 hp, 58 PI headroom. Better than the 720S ever was in FH5 because the hybrid torque fill kills the M838T engine's turbo lag. The carbon tub chassis is the lightest in class. Struggles on very high-speed tracks where active aero doesn't generate as much downforce as the GT3 RS, but on technical circuits it's a weapon. |
S1 Class Tuning Deep Dive
S1 tuning is about refinement, not transformation. With only 30-60 PI to spend, every single choice matters. The biggest fork in the road: tires or power? On handling-focused tracks, race tires (8-12 PI) are always the right call. On high-speed circuits, street tires with more engine upgrades can work, but your margin for error shrinks a lot. I've tried both approaches extensively and race tires win on like 80% of tracks.
Differential settings for mid-engine cars: The SF90 and Revuelto benefit from slightly lower accel diff (55-65%) to stop the AWD system from plowing on corner exit. Center diff bias should be 20/80 front/rear for road racing — enough front power for stability without killing rotation. Get this wrong and the car just won't turn.
Downforce: At S1 speeds (190-220 mph on straights), downforce is mandatory. Max rear aero on literally everything. Front aero depends on the track: max it on circuits with fast sweepers, dial it back on tight tracks to cut drag. The GT3 RS is the exception — its active aero means you don't need to touch the aero settings at all. The car sorts itself out.
Brake pressure: S1 cars carry so much speed into braking zones that brake balance actually matters. Shift bias 2-3% rearward on mid-engine cars to prevent the front tires from locking under heavy braking. The FH6 ABS simulation is better than FH5's. You can actually feel the difference now instead of it just being a number on a screen.