For wheeled agricultural or forestry tractors, of a power
Compressionignition internal combustion piston engine "diesel or semidiesel engine" for wheeled agricultural or forestry tractors, of a power > 100 kw
Compressionignition internal combustion piston engine "diesel or semidiesel engine" for wheeled agricultural or forestry tractors, of a power > 50 kw but < 100 kw
Compressionignition internal combustion piston engine "diesel or semidiesel engine" for wheeled agricultural or forestry tractors, of a power < 50 kw