Performance classes and PI
Performance Index, or PI, is a single number from 100 to 998 that rates a car's overall performance. It sorts every car into one of 7 classes and decides which events the car can enter. Slide the finder to place any build, then dig into what each class actually holds.
S1 Class 701-800
80 PI of headroom before S2
The class ladder
Every class, its PI range, and how the 614 cars in our roster spread across it. Counts, averages and drivetrain splits are read straight from the car list.
D Class
100-400 PIClassics, kei cars and everyday runabouts.
86
cars
Top of class · PI 400
1993 Renault Clio Williams
C Class
401-500 PIWarm hatches and entry sports cars.
97
cars
Top of class · PI 500
1984 Peugeot 205 Turbo 16
B Class
501-600 PIBalanced all rounders and classic tuners.
121
cars
Top of class · PI 600
1973 Mazda RX-3 Forza Edition
A Class
601-700 PIQuick, versatile and a hugely popular race class.
111
cars
Top of class · PI 700
1968 Ford Mustang GT 2+2 Fastback Forza Edition
S1 Class
701-800 PIFast sports cars and supercar entry points.
114
cars
Top of class · PI 800
1989 Nissan S-Cargo Forza Edition
S2 Class
801-900 PISupercars and serious performance.
55
cars
Top of class · PI 900
1994 Subaru Vivio RX-R Forza Edition
R Class
901-998 PIHypercars, race cars and factory prototypes. The top tier in FH6.
30
cars
Top of class · PI 998
1970 Porsche 3 917 LH Forza Edition
What PI measures
PI is built from 6 performance ratings, each scored from 0 to 10. Here is what each one tracks, and how the roster average shifts as you climb the ladder.
- Speed
- Top-end velocity on a long straight.
- Handling
- Grip and composure through corners.
- Acceleration
- How hard it pulls once already rolling.
- Launch
- Traction and drive off the line.
- Braking
- How short it hauls down from speed.
- Offroad
- Composure on dirt, gravel and broken ground.
Average rating by class
Roster mean, 0-10 scaleRead a row left to right to watch one rating climb the ladder. Offroad is the exception: it drifts down as PI rises, because the fastest classes are built for road and track, while D and C class lean on rugged all-surface machines. Braking and handling, by contrast, rise the steepest, which is what makes R class cars feel planted.
Working with classes
A class is a target, not a fixed label. Three things worth knowing before you build.
PI is not fixed
Every performance part you fit raises PI, and enough of them push a car into the class above. Tuning lets you trim a build to sit right on a class limit so you keep the most power the bracket allows.
Same class, different car
PI blends six ratings into one number, so two cars can reach the same figure from opposite directions. One leans on speed and launch, another on handling and braking, which is why a class is never one-size-fits-all.
Events lock to a class
Most races and online lobbies cap entries at a class. Build to the ceiling of that class, not past it, or the car is bumped up a bracket and left racing faster machinery.
Frequently asked
What is the highest class in Forza Horizon 6?
R class is the top class, covering PI 901 to 998. It replaces what older Forzas called S2 at the top, and is where race cars, factory prototypes and hypercars sit. Standard S2 has dropped to 801-900 to make room.
How many performance classes does FH6 have?
Forza Horizon 6 has 7 classes: D, C, B, A, S1, S2 and the new R class. Each spans 100 PI apart from D, which stretches from 100 up to 400.
Does upgrading change a car's class?
Yes. Adding power and performance parts raises PI, which can push a car into a higher class. Tuning lets you sit a build right at the top of a class limit to stay competitive.
Why do two cars in the same class feel so different?
PI is a single score built from 6 ratings: speed, handling, acceleration, launch, braking and offroad. A car can reach a given PI with strong speed and weak handling, or the reverse, so two cars sharing a class can drive nothing alike.
What PI do I need for A class racing?
A class runs from 601 to 700 PI, so an A class build sits at or just under 700. Because most events cap at the class limit, competitive A class cars are tuned to land as close to 700 as possible without tipping into S1.
Which class has the most cars?
In our roster of 614 cars, B class is the largest with 121. The mid brackets (B, A and S1) carry the bulk of the car list, while R class stays small and exclusive.