The Cavalier GSi 2000 turned Vauxhall’s company-car favourite into a discreet performance saloon with a celebrated 16-valve engine and serious competition credibility.
1. The engine became known as the red top
The C20XE two-litre 16-valve engine earned its nickname from the red spark-plug cover and became one of Vauxhall’s most respected power units.
2. Cosworth helped design the cylinder head
Early heads were cast by Coscast, fuelling an enduring debate over the relative merits of different production versions.
3. It was sold as an Opel Vectra elsewhere
Britain retained the Cavalier name while continental Europe knew the same generation as the first Opel Vectra.
4. The body kit was unusually restrained
Deeper bumpers, side skirts and a small rear spoiler communicated performance without the extravagance of many rivals.
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5. Four-wheel drive became available
The GSi 4×4 used a sophisticated transfer system to improve traction, later providing the basis for the turbocharged Cavalier and Calibra.
6. It carried a digital dashboard
Electronic instruments gave the cabin a distinctive period identity and are now difficult to replace correctly.
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7. Touring cars made it famous
Cavalier-based racers fought in the British Touring Car Championship during the category’s celebrated Super Touring era.
8. The road engine made about 150 bhp
Smooth delivery and a strong top end mattered more than turbocharged drama, making the GSi quick without being intimidating.
9. Four-wheel-drive servicing is specialist work
Incorrect tyre sizes, neglected fluids or transfer-box problems can create expensive failures.
10. Standard survivors are scarce
Many donated engines to kit cars and conversions, while others were modified or lost to corrosion and hard use.
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