The Story Of The Twin-Turbo MG Metro 6R4
When Will Gollop built a twin-turbocharged Metro 6R4 and won the European Rallycross championship with it.
When people think of Group B they imagine 500+ horsepower rockets, screaming their way down a narrow Corsican road lined with ecstatic crowds shouting and cheering on their favourite pilots. But when I think of Group B I imagine 10 over-boosted Metros and RS200s driven at their absolute limit, wheel to wheel in the final race of the British Rallycross season.
Among this herd of madmen who sat in these fierce Group B rallycross cars was the engineer and racing driver Will Gollop.
Gollop began his career driving Mini’s and then a Saab 99 but made the switch to an MG Metro 6R4 in 1986. That same year he drove his new 420hp motor to victory in the British Rallycross championship in his class. This marked the beginning of one of the best lives of any rallycross car.
He continued to win Grand Prix’s with the 6R4 and it was even raced by the familiar name that is Tiff Needell, but Gollop missed the championship victory feeling. So, spurred on by this 5-year drought of title victory he decided to rebuild his Metro, making what we would now consider the bold move of bolting two turbochargers to his engine.
Gollop set about this project wanting to maintain his high power, low weight formula which was made tricky by the 1989 rule change that saw the turbocharged engines multiplication factor increased from 1.4 to 1.7. to overcome this challenge, the iconic 3.0 V6 was de-stroked to 2.3 litres.
Due to the fact that smaller engines have lighter moving parts, the new 2.3 twin-turbo V6 stretched out into a much higher RPM range, from 9000 to a rumoured 11,000. Gollop’s Metro now produced 650hp in qualifying spec and 750hp in the finals, making him once again competitive with his opponents.
This dramatic face lift bought him the 1991 British title and very almost the European title, if it wasn’t for a terminal crash in the championship final at Lydden Hill while battling a pair of RS200’s which freely allowed rival Martin Schanche to walk it home.
The next year he achieved his dream of winning the European championship, as it turned out this was also his last opportunity to do so in his beloved Metro 6R4 due to the banning of Group B cars in rallycross for 1993. After this news he proceeded to build a Peugeot 306 which would replace the 6R4.
And there it is, the story of the race driving engineer who built himself a 2.3 litre twin-turbocharged MG Metro 6R4 and raced it to victory in the 1992 European Rallycross championship.