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Engine | Straight 4 | Straight 4 | Straight 4 | Straight 5 | |
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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 | 4 valves per cylinder
16 total valves | 2 valves per cylinder
8 total valves | 4 valves per cylinder
16 total valves | 4 valves per cylinder
20 total valves | |
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Displacement | 122 cu in | 122 cu in | 122 cu in | 149 cu in | |
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Bore x Stroke | 3 in x 4 in
0.93 ratio | 3 in x 4 in
0.93 ratio | 3 in x 3 in
1 ratio | 3 in x 4 in
0.92 ratio | |
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Compression ratio | 8.00:1 | 7.50:1 | 10.50:1 | 10.50:1 | |
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Maximum power | 190 hp @ 6000 rpm | 168 hp @ 5500 rpm | 152 hp @ 6000 rpm | 172 hp @ 6000 rpm | |
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Maximum torque | 219 ft.lb @ 2500 rpm | 202 ft.lb @ 3250 rpm | 144 ft.lb @ 4800 rpm | 162 ft.lb @ 3300 rpm | |
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Maximum RPM | 7000 | | | | |
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Fuel | Petrol | Petrol | Petrol | Petrol | |
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Catalytic converter | yes | yes | yes | yes | |
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Main bearings | 5 | | | 6 | |
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Construction | Cast iron block &
Alloy head | | | | |
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Coolant | Water | Water | Water | Water | |
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Intercooler | yes | yes | | | |
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Sump | Wet sumped | Wet sumped | | | |