Under the bonnet, the GTC concept has GM's 1.9-litre turbo diesel unit, and uses two turbochargers rather than the usual one.
The T6 engine is a high-performance engine with twin turbochargers.
They allow the turbine shaft to spin with less friction than the fluid bearings used in most turbochargers.
In the 18 cylinder version there are three turbochargers in each of the three turbocharger housings.
Barden's high precision bearings are also having a major impact in the rapidly developing automotive aftermarket for ball bearing turbochargers.