A special one-off Audi TT concept has been revealed at the Worthersee GTI festival. Called the TT ultra quattro concept, it is designed to demonstrate Audi's expertise in lightweight materials.
The TT ultra quattro concept is based on the TT S, but sheds 300kg and squeezes nearly an extra 100bhp from the 2.0 TFSI engine for a total of 306bhp. As a result, the 0-62mph time drops by 1.3 seconds to 4.2 seconds, while top speed climbs by 18mph to 173mph.
Back in November last year we met Audi’s new head of technical development, Wolfgang Durheimer, who told us: “A car in the TT segment weighing 1,000kg would be a very interesting proposition. It would be a derivative of the TT and the challenge is to make it a quattro too – that’s what I’ve asked my engineers.” Clearly, this new concept is the result of that request.
Tipping the scales at 1,111kg, despite keeping is quattro four-wheel-drive system, the ultra concept cuts weight in almost every area. The engine for example is 25kg lighter, thanks to modifications to the crankcase, balancer shafts and bolts, while steel suspension springs have been replaced by fiberglass-reinforced polymer coils weighing 40 per cent less.
The body structure sheds a further 43kg thanks to the use of carbon-fibre reinforced polymer (CFRP) in the centre tunnel, B-pillars and roof, plus magnesium components in the floor and hinge reinforcements. Carbon ceramic brake discs, aluminium calipers and a titanium exhaust also do their bit, while CFRP wheels with aluminium spokes weigh 20kg less than standard alloys.
A smaller lithium-ion starter battery, weighing just 4kg, is fixed underneath the driver’s seat, while fiberglass seats taken from the R8 GT slash a further 22kg. Conventional wing mirrors are replaced by rear-facing cameras and interior screens.
And according to Audi this is more than a mere engineering exercise – it could conceivably spawn a future low-volume Audi model series. It would be the perfect send-off for the current-generation TT, before an all-new version arrives in 2014.