BMW 3-Series

	Only the Volvo C70 boasts a similar retractable set-up in the premium cabrio class. That means the new 3-Series Convertible will steal a march on its main rivals

The lid has well and truly been lifted on BMW's new drop-top! Thanks to these spyshots, Auto Express can show you how the new 3-Series Convertible will look - and as you can see, it features a folding metal roof for the first time.

Only the Volvo C70 boasts a similar retractable set-up in the premium cabrio class. That means the new 3-Series Convertible will steal a march on its main rivals - Audi's fabric-topped A4 Cabriolet and the Mercedes CLK - to remain the best-seller in the category.

These pictures were snapped during the final development phase, prior to the Convertible's official unveiling early next year. They show how the styling draws heavily on that of the Coupé model, with short front overhangs, a bold swage line running along the doors and a stretched, rakish tail.

With the compact three-piece metal roof in place, the Convertible has the same profile as the two-door Coupé. And compared to folding metal roof rivals, the rear deck is short and compact, so the 3-Series is just as sporty-looking with the top stowed.

The transition from open to closed position should be one of the quickest in the class, too, with the electric operation controlled via a button mounted next to the gearlever.

Final production versions of the newcomer will be fitted with body-coloured roofs. Behind the disguise in our pictures lie the same light units as on the Coupé, with distinctive headlamps up front and LED tail-lights.

The BMW's combination of a complex compact folding roof with one of the longest wheelbases in the sector will mean class-leading practicality. So there should be space for two tall adults in the rear and enough room in the boot for several pieces of luggage.

Extra chassis strengthening has made the model heavier than before. However, BMW's decision to employ a folding metal roof means considerable improvements have been made in struc-tural stiffness - so crash protection, security, and refinement is better than on the previous-generation car.

The newcomer will be available with the same line-up of powerful six-cylinder engines as the Coupé. From launch, there will be a 218bhp 2.5-litre unit for the 325i and BMW's latest twin-turbocharged, direct-injection 3.0-litre petrol motor under the bonnet of the 335i. Producing 306bhp and 400Nm of torque, the turbo unit will propel the new drop-top from 0-60mph in around six seconds on the way to a limited top speed of 155mph.

As with its 2.5-litre brother, the 3.0-litre Convertible will be available with a choice of six-speed manual or automatic gearboxes. Diesel engines and low-power petrol units are set to join the line-up later in 2008.

As for the rest of the driving experience, buyers can expect it to be very similar to the Coupé's, with BMW's trademark crisp handling, compliant ride and high-speed body control. The firm's Active Steering system, which features a variable-speed rack, will be available as an option.

Inside, the cabin gets low-slung seats and a raft of clever features, including seatbelts which slide forward to the driver and passenger as soon as the doors are pulled shut. Other comfort features such as climate control and automatic headlights are likely to be offered as standard. The new 3-Series Convertible is expected to make its world debut at the Los Angeles Motor Show in December, and is set to arrive at UK dealers in time for next summer. Prices are tipped to start from around £27,000.