Volvo has announced a special version of the C30 hatchback, aptly named the Efficiency. Powered by a 78kW 1.6-litre turbodiesel, the C30 Efficiency claims an average consumption figure of 4.5-litres per 100km's.
The C30 Efficiency has an extremely low CO2 emission coefficient of below 120 g/km.
Achieving these efficiency gains have been four key design principles - aerodynamics, rolling resistance, gearing and powertrain efficiency.
Subsequently the C30 Efficiency has a reduced chassis height, a new roof spoiler, underbody panels and 16-inch wheels that ride on low friction tyres.
Higher gearing on the top three ratios have aided consumption, whilst low-friction transmission oil and optimisation of the steering assistance and engine management systems have produced further efficiency gains.
With governments, especially in Europe, aggressively taxing vehicles according to their emissions and consumption footprints, the C30 Efficiency makes a strong case for itself.
Volvo is also planning to launch its Powershift gearbox feature in 2008. Powershift cuts fuel consumption by about 8% compared with today's automatic transmissions. It will be available in the Volvo C30, S40 and V50 with the 2-litre turbodiesel (2.0D) engine.
Put simply, one could say that Powershift consists of two manual gearboxes that work in parallel and are controlled by separate clutches.
Since there is no disruption in torque delivery during the gearchanging process, shifts are instantaneous and the efficiency rating is higher.