Even with my limited race car knowledge I can grasp that, but surely the hybrid system is going to add to the overall weight of the car, Dr Ullrich? "It does, but we've reduced the weight in other areas, such as the gearbox, which we've built out of carbon fibre. Now the R18 e-tron is actually only a fraction heavier than the non-hybrid R18. Obviously our main aim is to win but we also want to prove new technology, too, just as we did with the Quattro rally cars of the 1980s, and Le Mans is the perfect place to showcase it."
"It's not that I didn't think the technology would work, I was just a little concerned over how it would cope with such a long and arduous race. That was my initial thought, but since then I've spent a huge amount of time behind the wheel during testing and it performs incredibly well, much better than I was expecting. It handles much like the non-hybrid R18, too. The noise from the hybrid system was a bit disconcerting to begin with, though. I didn't need to look at my gauges to know it was working because it makes this incredibly din, like a washing machine on full spin cycle, but only louder."
Toyota has one too. Emphasising the pioneering approach to this technology which has seen more than 3.5-million Toyota hybrid vehicles sold worldwide, it has just finished extensive testing of the TS030 Hybrid (TS, being the acronym for ToyotaSport).
This car is the successor to the TS010 and TS020 which successfully participated at Le Mans during the 1990s and adopts a similar hybrid system to the Audi - both cars have to strictly adhere to the current race rules. These regulations limit hybrid systems to recovering a maximum of 500kj between braking zones whilst restricting deployment to only two wheels. The main difference between the two, however, is that Audi is utilising an existing car, the diesel R18 which won last year, whereas Toyota has started from scratch, building a brand new car which has a carbon fibre LMP1 chassis and is powered by a V8 3.4-litre normally-aspirated petrol engine.
Although many eyes will be on both of these cars, the Nissan-backed DeltaWing is probably likely to receive the most attention. It's a fantastic and futuristic-looking thing, which appears to like it has come straight off the pages of a Marvel comic. Surprisingly, for a car that appears to have been designed by Buzz Lightyear, it isn't powered by some experimental nuke-fuelled, quad-turbo V12, instead, it has a humble 300hp, 1.6-litre turbocharged motor which first originated from the Nissan Juke 1.6 DIG-T. That's not to say the DeltaWing body writes out a cheque the engine can't cash. The dramatic styling is more than just a show-stopper; it has been designed to balance weight - it weighs half as much as a conventional LMP car - against aerodynamics. Drag is halved, as is fuel consumption which is also cut by 50 per cent.
Between Danny filing his copy and publication of this story, the R18 e-tron Quattro has had its race debut, battling with the 'regular' R18 Ultra for a dominant 1-2-3-4 Audi whitewash at the Spa 6 Hours this weekend. The e-trons led the race initially, before the leading car of Marcel Fassler, Andre Lotterer and Benoit Treluyer (last year's Le Mans winners) had to submit to the challenge of the non-hybrid R18 Ultra driven by Romain Dumas, Loic Duval and Marc Gene.