Audi's UK division has opened the order books on the most fuel-efficient version of its A4 saloon, the 2.0 TDIe which returns a combined economy figure of 61.4mpg Imp. (4.6lt/100km or 51/1mpg US) and a low CO2 output of 120g/km. Available exclusively is sedan form and priced from £23,340 OTR, the Audi A4 2.0 TDIe will reach its first customers in October. 
The latest 'e' model in Audi's range is powered by a 136HP version of the 2.0-liter TDI engine first seen in the A6 2.0 TDIe. Producing 320Nm of torque from 1,750rpm, the directly injected diesel that is linked to exclusively to a six-speed manual gearbox allows the A4 2.0 TDIe to reach 62mph (100km/h) from standstill in 9.5 seconds and go on to a top speed of 134mph or 215km/h.
The A4 2.0 TDIe employs various efficiency measures such as a start-stop system, recuperation technology that recycles a proportion of the wasted kinetic energy under braking, a five per cent increase in the transmission's final drive ratio and low rolling resistance tires plus grille and under-body modifications combined with a lowered sports suspension to enhance aerodynamics.
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