C20NE

Opel Calibra's C20NE engine tuned up to 142 bhp (106 kW; 144 PS).

The C20NE is a Family II fuel injected, four cylinder engine developed by General Motors in the late 80's. It is essentially very similar to the C20XE, but has a simpler cylinder head design which features 2 valves per cylinder (rather than the four of the C20XE) and single overhead camshaft. For this reason, the powerplant is commonly referred to as '8 Valve'. The C20NE was factory fitted to early Opel Astra and Vauxhall Cavalier models, but also found its way into the entry spec Calibra. Subsequently, the fitment of the C20NE engine permitted the use of an automatic transmission, particularly in the Calibra where the C20XE developed excessive amounts of power and torque for the automatic box. Although lacking the power of its bigger siblings, the C20NE has proven to be an economical and robust engine, with many examples still running flawlessly today.

Engine code

The engine code (C20NE) describes the engines specifications.

• C - Emissions Classification
• 20 - Displacement (2000CC)
• N - Compression Threshold (9.0:1 - 9.5:1)
• E - Fuel System (Electronic - Multipoint, Sequential)

Engine characteristics

Engine	C20NE
Configuration	Inline, SOHC, Transverse 4 Cylender
Displacement	1998cc (121.88 cu in)
Bore	86.0mm (3.4in)
Stroke	86.0mm (3.4in)
Power	115 BHP @ 5200 RPM
Torque	170 NM (125 lb/ft) @ 2600 RPM
Max rpm	6400
Compression ratio	9.2:1
Valve-Train	Belt Driven, 2 Valves per Cylender
Engine Management	Bosch, Motronic M1.5 / Motronic M1.5.2.
Firing order	1-3-4-2