W670-K carburetor, 5.4:1 compression, 65 Octane, front exhausts and 225 hp (168 kW) W670-L carburetor, 5.4:1 compression, 73 Octane, rear exhausts and 225 hp (168 kW) W670-M carburetor, 6.1:1 compression, 80 Octane, front exhausts and 240 hp (179 kW) W670-N carburetor, 6.1:1 compression, 80 Octane, rear exhausts and 240 hp (179 kW) W670-K1 fuel injection, 5.4:1 compression, 73 Octane, front exhausts and 230 hp (172 kW) W670-L1 fuel injection, 5.4:1 compression, 73 Octane, rear exhausts and 230 hp (172 kW) W670-M1 fuel injection, 6.1:1 compression, 80 Octane, front exhausts and 250 hp (186 kW) W670-N1 fuel injection, 6.1:1 compression, 80 Octane, rear exhausts and 250 hp (186 kW)