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Engine | Straight 3 | V 12 ( 65.0º vee) | V 12 ( 60.0º vee) | Straight 4 | |
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Valve train | Two stroke | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | |
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Valves | | 5 valves per cylinder
60 total valves | | 2 valves per cylinder
8 total valves | |
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Displacement | 55 cu in | 287 cu in | 305 cu in | 121 cu in | |
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Bore x Stroke | 3 in x 3 in
0.93 ratio | 3 in x 3 in
1.23 ratio | 3 in x 3 in
1.24 ratio | 4 in x 3 in
1.15 ratio | |
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Compression ratio | 7.00:1 | | 11.00:1 | 8.50:1 | |
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Maximum power | 51 hp @ 4250 rpm | 760 hp @ 10500 rpm | 550 hp @ 8000 rpm | 172 hp @ 7000 rpm | |
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Maximum torque | 56 ft.lb @ 2800 rpm | 384 ft.lb | | | |
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Fuel | Petrol | Petrol | Petrol | Petrol | |
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Catalytic converter | no | yes | no | no | |
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Main bearings | | | 7 | | |
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Construction | | | Light alloy block &
Light alloy head | | |
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Coolant | | Water | Water | Water | |
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Sump | | Dry sumped | | | |