British Leyland's efforts to replace the Mini traced back to a project called ADO88 in the early 1970s, but financial difficulties and bankruptcy delayed progress. In 1977, BL chairman Michael Edwardes ordered a redesign, enlarging and repositioning the car as a true supermini rather than an economy runabout. This revised programme, designated LC8, was led by stylists David Bache and Harris Mann and reused much of the Mini's engineering — the A-Series engine, front-wheel drive via a sump-mounted gearbox, and Hydragas suspension borrowed from the Austin Allegro — while modernising all major components. The car was produced at Longbridge, where a £200 million robotised body assembly line had been installed in 1978. From 1987 the Austin brand was discontinued and the car sold simply as the Metro; in 1990 it was heavily revised and relaunched as the Rover Metro, with new K-Series engines replacing the long-running A-Series units. In 1995 the Rover 100 nameplate replaced Metro in Britain, and production ended on 23 December 1997. Total production across all variants reached 2,078,218 units.
Sportier MG-badged versions of the Metro became available in May 1982. The MG Metro 1.3 offered 72 bhp and a top speed of 103 mph. The MG Metro Turbo, shown publicly at the 1982 Birmingham Motor Show, developed 93 bhp and reached 112 mph. This turbocharged variant featured stiffer suspension with engineering input attributed to Lotus, a nitrided steel crankshaft, sodium-cooled exhaust valves, and ventilated front disc brakes.
Created for the Group B rally category, the MG Metro 6R4 of 1984 shared only its name and exterior skin with the production car. Developed by Williams Grand Prix Engineering, it was a semi-monocoque four-wheel-drive machine powered by a bespoke 3-litre V6 engine designed by David Wood, drawing on the architecture of the Cosworth DFV. The engine featured twin overhead camshafts, four valves per cylinder, and no turbocharger — an unusual choice when most Group B rivals relied on forced induction. Power in homologation Clubman specification was approximately 250 bhp; factory International specification cars produced over 410 bhp. Around 200 Clubman road cars were sold at £40,000 each to satisfy homologation requirements.
The 6R4 made its competition debut at the 1985 Lombard RAC Rally, where Tony Pond finished third, behind two Lancia Delta S4s. In the 1986 season the car entered rounds at Monte Carlo, Sweden, Portugal, and Corsica, but mechanical problems with the V6 engine prevented any of the factory entries from finishing. Group B was banned midway through 1986 following a series of fatal accidents involving both drivers and spectators. After Austin Rover's works withdrawal, all remaining parts and engines were sold to Tom Walkinshaw Racing; the V6 unit was subsequently fitted with turbochargers and used in the Jaguar XJ220.
In 1981, a one-make Metro Challenge series was launched, renamed the MG Metro Challenge in 1983 and the MG Metro Turbo Challenge in 1987. The series ran until the end of 1990. It attracted both current and future British Touring Car Championship competitors: Steve Soper became the inaugural champion, and Tim Harvey made his tin-top racing debut in the 1984 season. For the 1986 season the series expanded to include an international championship. A separate MG Metro Super Challenge for 6R4s ran in 1988 and 1989, with Tony Pond appearing as a notable guest. At the Austin Rover Rallysprint at Donington Park in 1983 and 1984, the MG Metro was used for the Autotest Time Trial stage, with Nigel Mansell winning the overall event in 1983 and Marc Duez in 1984. The Metro also competed in the British Touring Car Championship and European Touring Car Championship from 1981, with appearances continuing into the Italian Championship as late as 1990. Colin Turkington won his first motor racing title in a Metro in his native Northern Ireland in 1998, in what became known as the Northern Irish Metro Championship.
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