The New BMW 1 Series Convertible | Part Three

BMW 1 Series Convertible Roof Up

BMW 1 Series Convertible

BMW 135i Convertible

Straight six cylinder petrol engine with Twin Turbo and High-precision direct injection.
Capacity: 2,979cc.  Output: 306hp at 5,800min. Torque: 400Nm at 1,300–5,000min.  Acceleration from 0-62mph: 5.6 seconds.  Top speed: 155mph (electronically limited).  Average consumption and CO2 emission figures not yet available.

BMW 125i Convertible

Straight six cylinder petrol engine with magnesium aluminium alloy crankcase, double VANOS and VALVETRONIC.  Capacity: 2,996cc.  Output: 218hp at 6,100min.  Torque: 270Nm at 2, 500min.  Acceleration from 0-62mph: 6.8 seconds.  Top speed: 148mph.  Average consumption: 34.9mpg with CO2 emissions: 195g/km.

BMW 120i Convertible

In-line four cylinder petrol engine with High-precision direct injection.  Capacity: 1,995cc.  Output: 170hp at 6,700min.  Torque: 210Nm at 4,250min.  Acceleration from 0-62mph: 8.4 seconds.  Top speed: 137mph.  Average consumption: 42.8mpg and CO2 emissions: 158g/km.

BMW 118i Convertible

In-line four cylinder petrol engine with High Precision Direct Injection.  Capacity: 1,995cc.  Output: 143hp at 6,000min.  Torque: 190Nm at 4, 250min.  Acceleration 0-62mph: 9.3 seconds.  Top speed: 130mph.  Average consumption and CO2 emission figures not yet available.

BMW 120d Convertible

In-line four cylinder diesel engine with turbo charge and common rail direct injection.  Diesel Particulate Filter fitted as standard.  Capacity: 1,995cc.  Output: 177hp at 4,000min.  Torque: 350Nm at 1,750– 3,000min.  Acceleration 0-62mph: 8.1 seconds.  Top speed: 138mph.  Average consumption and CO2 emission figures not yet available.

EfficientDynamics – balancing power, economy and emissions

The new BMW 1 Series Convertible is the latest in the line of BMW models announced in 2007 to benefit from a raft of performance and economy measures under the banner of BMW EfficientDynamics.

Brake Energy Regeneration features on all models and uses intelligent Alternator Control and an Absorbent Glass Matt battery to harness engine power that would normally have been lost during engine over-run or braking.  An optimum gear shift indicator also features on all manual-gearbox cars to inform the driver of the appropriate gear for the most economical driving.

All models feature a new, clutched air conditioning pump.  When not in use, the pump decouples and uses only 200 watts, or ten per cent, of the normal power needed to drive a conventional pump.  In addition, other than the range-topping 135i Convertible, all models feature electronic power steering.  In contrast to conventional hydraulic power steering, the 1 Series’ electronic system operates on an ‘on demand’ basis, reducing engine output normally needed to power the steering hydraulics.

All four-cylinder manual gearbox cars feature BMW’s Auto Start-Stop system as standard.  In urban traffic, when the gear is deselected and the clutch pedal raised, the engine automatically cuts out, thus eliminating emissions and any fuel consumption while static.  When the traffic starts moving, the clutch is depressed in order to select the gear to pull away and, immediately, the engine fires back into life.

Drivetrain and chassis – a supple yet sporting drive

All BMW 1 Series models feature a six-speed manual gearbox as standard with owners able to opt for a six-speed automatic gearbox on all models.  Steering wheel-mounted paddles enabling manual shifts of the auto ’box are standard on 135i cars and optional on 125i models.

Finally, in common with 135i Coupé customers, purchasers of 135i Convertible models also benefit from BMW’s electronic differential lock.  Promoting a sporting and involving style of driving, the electronic differential lock works when the car is accelerating hard out of corners or tight bends.  In this situation, it electronically slows the spinning inside rear wheel to enhance vehicle traction and ensure that all available power is transferred to the road.

Pricing and on-sale information of all new BMW 1 Series Convertible models will be announced at a later date.

Published 2 October 2007 Melanie Carter

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