One car magazine reports that BMW has modified its 3.0d and 3.0sd X5 large SUVs for the UK market, which was prompted by the proposed £25 London Congestion surcharge for VED band G vehicles. From December, the 232bhp 3.0d will now achieve CO2 emissions of 214g/km, down from 231g/km, while the 282bhp 3.0sd will drop to 216g/km, hence dropping into VED band F.
The various improvements was achieved by fitting a regenerative braking system, an intelligent alternator and intelligent airflaps behind the radiator grille that improve the car’s aerodynamics at speed – features that have recently appeared on other BMWs as part of its Efficient Dynamics program.
The revisions will make these two models, and the hybrid Lexus RX400h and Volvo’s XC90 D5 the only large, premium-brand four-wheel drives that do not attract the proposed £25 charge. BMW is also working to improve its 318d 3-series, which currently emits 122g/km, to get it below the 120g/km threshold.
Other vehicles that would be improving their current technologies are Volvo, Nissan, Audi and Citroen.
Volvo C30 will have a low CO2 emission by 2008 and a new Powershift dual clutch transmission for the Volvo C30, S40 and V50.
Meanwhile Audi is launching an A3 1.9 TDI hatchback with engine, transmission and aerodynamics optimized to reduce CO2 output to 119g/km and increase fuel economy to 62.7mpg (combined). The car has five-speed manual transmission, develops 105PS @ 4,000rpm, 250Nm @ 1,900rpm, and reaches from 0 to 62mph in 11.4 seconds, with a top speed of 120mph.
Citroën’s C5 Airscape concept cabriolet just announced sports a folding carbon-fibre roof which resembles a canvas one. Fuel economy is managed by an ‘UrbanHybrid’ system that includes a reversible alternator-starter and super capacitors. This system allows onboard equipment, such as the air conditioning or audio system, to be powered by energy recovered during braking and deceleration, while engine torque can be temporarily boosted when required.
The ‘UrbanHybrid’ system, which helps reduce CO2 emissions by 24g/km on the combined cycle, incorporates the stop-start system deployed already in certain other Citroen models, with a bio-diesel compliant 208bhp 2.7HDi V6 engine equipped with a particulate filter, further minimizing any impact on the environment.
Nissan has announced in Japan that all its future new models and refreshed current models will be equipped with a fuel efficiency gauge which provides the driver with both instant fuel-efficiency and average efficiency readings.
Based on Nissan’s trials, drivers have tended to improve their ‘eco-driving’ habits over time, prompted by the real-time fuel-efficiency readings. Driving improvements also included smoother acceleration and braking, which potentially could lead to an average 10% improvement in fuel-efficiency. In January this year Nissan introduced the eco-driving information service through its CARWINGS navigation system in Japan to promote more economical driving habits.