| Alfa Romeo 690 engine | |
|---|---|
| Overview | |
| Manufacturer | Alfa Romeo |
| Also called | 690RC |
| Production | 1996 |
| Layout | |
| Configuration | Naturally aspirated 90° V6 |
| Displacement | 2.5 L (153 cu in) |
| Cylinder bore | 88–91 mm (3.5–3.6 in) |
| Piston stroke | 63–68.3 mm (2.48–2.69 in) |
| Valvetrain | 24-valve, DOHC, four-valves per cylinder |
| Compression ratio | 12.5:1 |
| Combustion | |
| Fuel system | Fuel injection |
| Oil system | Dry sump |
| Output | |
| Power output | 483–500 hp (360–373 kW) @ 11,900 rpm |
| Torque output | 220 lb⋅ft (298 N⋅m) @ 8000 rpm |
| Dimensions | |
| Dry weight | 85–89 kg (187–196 lb) |
The Alfa Romeo 690 engine is a custom-built, production-based, high-revving, prototype, four-stroke, 2.5-liter, naturally aspirated, V6 racing engine, designed, developed and produced by Alfa Romeo, purpose-built for the 1996 ITC season. It was loosely based on the PRV engine, used in the Lancia Thema 6v.[1][2]