|The Clio dCi 85 Renault eco2. Click to enlarge.|
Renault introduced its lowest CO2-emitting production car yet ahead of the Brussels Motor Show. The new version of Clio dCi 85 Renault eco² produces 98 grams CO2 per kilometer, corresponding to combined cycle fuel consumption of 3.7 liters/100km (63.6 mpg US) and a theoretical range of 1,486 km (923 miles).
A series of changes to the engine and the rest of the vehicle resulted in a significant reduction in CO2 emissions of 17 g/km (an improvement of 15%) without any impact on the punch of the vehicle.
Renault’s engineers focused particularly on fine-tuning the dCi 85 diesel powerplant in order to achieve the greatest possible improvement in CO2 emissions levels without any compromise in performance. Among the changes are:
Longer gearing across all the transmission ratios: the torque and the flexibility of the dCi 85 allow this to be achieved without any significant impact on performance.
Reduction of frictional losses in the engine and gearbox with the introduction of low-viscosity lubricants.
Dedicated engine mapping focused on reducing fuel consumption and CO2 emissions.
The Euro 4-compliant 1.5-liter engine delivers maximum power of 63 kW (85 hp) @ 3,750 rpm and maximum torque of 200 N·m (148 lb-ft) @ 1,900 rpm, with a compression ratio of 17.9:1. The engine is matched with a 5-speed gearbox. Top speed is 176 km/h (109 mph). The vehicle is equipped with electric variable rate power steering.
To reduce rolling resistance and drag, Renault extended the flexible lip under the front bumper by 15mm and added front wheel arch liner extension flaps and a specific underbody enclosure for rear axle. These aerodynamics-related improvements had no adverse effect on Clio’s looks, Renault said, and were achieved without use of intrusive solutions as a rear lip spoiler or full disc wheel trims.
The car is also fitted with Michelin 185x60 R15 low energy consumption tires. Taken together, these changes bring about a 5% improvement in CdA, taking it from 0.725 to 0.690 and directly benefiting the vehicle’s CO2 emissions. The reduction of 17 g/km has been achieved without any impact on driving pleasure, comfort or noise levels, Renault said.
The new version of Clio will sell at the same price as the 115 g/km version, a further sign of the Renault eco² signature’s bid to make ecological and economical vehicles available to as many motorists as possible.
Renault is also introducing a new gasoline engine in the Clio, a Euro5-compliant TCe 100 with CO2 emissions reduced to 129 g/km, representing a gain of 8 g/km.