Vehicles shall compete in the following capacity classes which aligns with the existing Na, Nb and Nc capacity Classes:
- Class A Over 5100cc
- Class B 3501cc - 5100cc
- Class C 3001cc - 3500cc
- Class D 2001cc - 3000cc
- Class E 1501cc - 2000cc
- Class F 1101cc - 1500cc
- Class G Up to 1100cc
The Effective Capacity shall be the product of the Swept Volume and an equivalence factor dependent on the engine configuration as per other MSA regulations
- Piston engine – normally aspirated 1.00
- Piston engine – supercharged 1.70
- Rotary engine – normally aspirated 1.80
- Rotary engine – supercharged 3.06
- Piston diesel – supercharged 1.50