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| Type | Fixed-head coupé | | Fixed-head coupé | | |
| Seats | 2 | | 4/5 | | |
| Doors | 2 | | 2 | |
|
| Top Speed | | | 155 mph | | |
| Specific Output | 0 hp/cu in | | 0 hp/cu in | |
|
| Engine | W 18 ( 60.0º vee) | | V 12 | | |
| Valve train | Double overhead camshaft (per bank) | | Double overhead camshaft (per bank) | | |
| Valves | 4 valves per cylinder
72 total valves | | 4 valves per cylinder
48 total valves | | |
| Displacement | 382 cu in | | 365 cu in | | |
| Bore x Stroke | 3 in x 3 in
1.01 ratio | | 4 in x 3 in
1.11 ratio | | |
| Compression ratio | 11.50:1 | | 10.00:1 | | |
| Maximum power | 555 hp @ 6800 rpm | | 394 hp @ 5200 rpm | | |
| Maximum torque | 479 ft.lb
@ 4000 rpm | | 420 ft.lb
@ 3800 rpm | | |
| Fuel | Petrol | | Petrol | | |
| Catalytic converter | yes | no | yes | | |
| Main bearings | | | 7 | | |
| Coolant | Water | | Water | |
|
| Wheelbase | 104 in | | 116 in | | |
| Length | 174 in | | 201 in | | |
| Width | 79 in | | 75 in | | |
| Height | 45 in | | 55 in | | |
| Track | | | front: 64 in
rear: 62 in | | |
| Drag coefficient | | | 0.280 | | |
| Fuel capacity | | | 26 US Gal | |
|
| Engine location | Middle | | Front | | |
| Engine Alignment | Longitudinal | | Longitudinal | | |
| Wheel Drive | Rear wheel drive | | Rear wheel drive | | |
| Transmission | | | 5, Automatic
| | |
| Top gear ratio | | | 0.83 | | |
| Steering | | | Recirculating ball | | |
| Power Steering | | | yes | |
|
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