Audi R18 e-tron Quattro German car-maker Audi will showcase its R18 e-tron Quattro during the 2014 Auto Expo. Under the hood is a new V6 TDI diesel engine. The new R18 e-Tron Quattro then utilises two hybrid systems. One of those systems dubbed Energy Recovery System Heat (ERS-H) stores energy converted from heat while the second system is a more traditional KERS system which Audi calls ERS-K. This system stores energy created under braking and the power from these two hybrids is then stored in an improved flywheel energy storage system. The 2014 model is said to consume 30 per cent less fuel than previous version.