Audi is using the RS5 TDI Concept car to show off its new diesel technology. Under the hood the 3.0-liter TDI twin turbo produces 283 kilowatts of power, rocketing the car from 0 to 100 kmh in just four seconds. In addition to its conventional exhaust-driven turbocharger, it's also equipped with an electric one. The electric turbocharger boosts the engine's power very quickly and smoothly -- even at low revs. The RS5 TDI is still a concept car.