Performance classes and PI
Performance Index, or PI, is a single number from 100 to 999 and up that rates a car's overall performance. It sorts every car into a class and decides which events the car can enter.
D Class
Classics, kei cars and everyday runabouts.
C Class
Warm hatches and entry sports cars.
B Class
Balanced all rounders and classic tuners.
A Class
Quick, versatile and a hugely popular race class.
S1 Class
Supercars and serious performance.
S2 Class
Hypercars and extreme builds.
R Class
New in FH6. Race cars, factory prototypes and LMP style machines.
What PI measures
PI is built from six performance ratings. A car can reach the same PI with very different strengths, which is why two cars in one class can feel nothing alike.
Speed
Top speed across the car's gearing.
Handling
Grip and cornering ability.
Acceleration
How quickly it reaches speed.
Launch
Traction and pace off the line.
Braking
Stopping distance and control.
Offroad
Composure on dirt and rough ground.
Frequently asked
What is the highest class in Forza Horizon 6?
R class is the top class, introduced in Forza Horizon 6 for race cars and factory prototypes above S2. It sits at 999 PI and up.
How many performance classes does FH6 have?
Forza Horizon 6 has 7 classes: D, C, B, A, S1, S2 and the new R class.
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.