Twenty years ago the British Touring Car Championship was reaching peak popularity with global motorsport fans. On track, the 1996 season was being dominated by an all-conquering silver machine.Full disclosure – the Audi A4 quattro Super Tourer is, without doubt, the favourite BTCC machine of ESM‘s Editor. Ever. He even has the t-shirt, although it’s a little tight after nearly two decades… So the news that Audi Sport legend Frank Biela is going to be reunited with the A4 quattro this weekend is a big deal.In 1996 the BTCC was one of the most competitive championships on the planet. To turn up and take both Drivers’ and Manufacturers’ titles at the first time of asking, was a huge achievement for Audi Sport, and a massive marketing boon for the Audi brand. Using all-wheel-drive gave the A4 a big advantage over two-wheel-drive rivals, resulting in Biela winning eight races in addition to taking another twelve podiums. Weight penalties in 1997 meant Biela could only fight to second in the championship, whilst for 1998 all-wheel-drive was banned from Super Touring. Although the technical ability of the A4 quattro was immense, Frank Biela’s own personal talent cannot be understated. Along with the BTCC title, his career highlights include: five outright Le Mans wins (2000-2002, 2006, 2007), two American Le Mans Series wins (2003, 2005), 1991 DTM champion, 1993 French Touring Car champion, and 1995 Touring Car World Cup winner. For...