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Engine | Straight 4 | Straight 6 | Straight 6 | |
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Valve train | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | |
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Valves | 4 valves per cylinder
16 total valves | 4 valves per cylinder
24 total valves | 4 valves per cylinder
24 total valves | |
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Displacement | 145 cu in | 121 cu in | 170 cu in | |
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Bore x Stroke | 3 in x 4 in
0.9 ratio | 3 in x 3 in
1.21 ratio | 3 in x 3 in
1 ratio | |
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Compression ratio | 10.40:1 | 11.00:1 | 10.20:1 | |
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Maximum power | 171 hp @ 6400 rpm | 152 hp @ 5900 rpm | 196 hp @ 5300 rpm | |
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Maximum torque | 160 ft.lb @ 4500 rpm | 140 ft.lb @ 4200 rpm | 206 ft.lb @ 3950 rpm | |
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Maximum RPM | 6600 | | | |
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Fuel | Petrol | Petrol | Petrol | |
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Catalytic converter | yes | yes | yes | |
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Main bearings | | 7 | 7 | |
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Construction | Aluminium block &
Aluminium head | | | |
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Coolant | Water | Water | Water | |
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Sump | Wet sumped | | | |