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Engine | Straight 4 | Straight 4 | Straight 4 | Straight 4 | |
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Valve train | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | Double overhead camshaft (per bank) | |
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Valves | 2 valves per cylinder
8 total valves | 4 valves per cylinder
16 total valves | 4 valves per cylinder
16 total valves | 4 valves per cylinder
16 total valves | |
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Displacement | 98 cu in | 110 cu in | 85 cu in | 97 cu in | |
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Bore x Stroke | 3 in x 3 in
1.04 ratio | 3 in x 4 in
0.9 ratio | 3 in x 3 in
0.95 ratio | 3 in x 3 in
1.01 ratio | |
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Compression ratio | 9.50:1 | 10.50:1 | | 10.50:1 | |
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Maximum power | 122 hp @ 6200 rpm | 124 hp @ 5700 rpm | 132 hp @ 7400 rpm | 140 hp @ 7000 rpm | |
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Maximum torque | 105 ft.lb @ 5500 rpm | 122 ft.lb @ 3000 rpm | 100 ft.lb @ 5000 rpm | 115 ft.lb @ 5000 rpm | |
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Maximum RPM | 6500 | | 7600 | | |
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Fuel | Petrol | Petrol | Petrol | Petrol | |
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Catalytic converter | no | yes | yes | yes | |
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Main bearings | 5 | | | | |
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Construction | Cast iron block &
Light alloy head | | | | |
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Coolant | Water | Water | Water | Water | |