| Technical specification - 420 Si 2-litre | |
| Body type | 4-door sports saloon |
| Production years | From 1986 to 1988 |
| Engine | Front engined V 6 cylinder @ 90° |
| Bore and stroke | 82 mm / 63 mm |
| Engine capacity | 1996,2 c.c. |
| Compression ratio | 7,8:1 |
| Maximum power | 220-bhp @ 6350 rpm |
| Distribution | Twin overhead camshaft, three valves per cylinder |
| Induction system | Supercharged with No 2 water-cooled IHI turbochargers/ No 2 intercoolers and Weber Multi Point electonic injection |
| Ignition | Single electronic |
| Lubrification | Forced with delivery pump |
| Transmission | Rear wheel drive |
| Clutch | Single dry plate |
| Gearbox | ZF Type 5 speed and reverse |
| Chassis | Integral body |
| Front suspension:- | Independent, Mac Pherson strut type, coil-springs and double action telescopic shock absorbers |
| Rear suspension:- | Independent, coil-springs and double action telescopic shock absorbers |
| Brakes | Servo assisted discs on all four wheels |
| Wheelbase | 2600 mm |
| Wheel tracks | Front 1442 mm Rear 1450 mm |
| Wheels | Magnesium light alloy, size 7J x 14 |
| Tyres | Front:- 205/60 VR 14 Rear:- 205/60 VR 14 |
| Dry weight | 1086 kg |
| Maximum speed | Over 228 km/h |
| Models constructed | 524 |
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