more cost-effective and fuel-efficient, and is manufactured at the BMW Hams Hall engine plant in Warwickshire, United Kingdom. The development and engineering was done in Munich, Germany at BMW Group headquarters, and by external third parties. Although the new model looks very similar to its predecessor, every panel was different and new safety requirements resulted in the overall length increasing by . The second generation Mini was introduced in the Cooper and Cooper S trim levels; the range was added to in 2007 with the Mini One. For the first time, there was a diesel-powered Cooper, available from April 2007, and badged as the Cooper D, which was supplemented in January 2011 with a new 2.0 L diesel for the automatic Cooper and high performance Cooper SD. The Convertible and Clubman versions followed later. In 2009, the Mini First trim level was launched in the UK, which is a low-end, petrol-only version, with less power and a lower speed. The Mini John Cooper Works Challenge is a purpose-built race car, based on the Mini Hatch, and manufactured in the BMW Motorsport factory located in Munich. It was unveiled in 2007 at the IAA Motor Show. In 2009 a John Cooper Works World Championship 50 special edition was unveiled in 2009 Mini United Festival in Silverstone. Mini Clubman (2008 to 2014) The Mini Clubman is an estate Mini, introduced for the 2008 model year and available in One, Cooper, Cooper S, and Cooper D variations. While identical to the Hatch/Hardtop from the B-pillars forward, the Clubman is longer overall, with a correspondingly stretched wheelbase that is longer; this provides more rear-seat leg room and substantially increased cargo space when compared to the Hardtop— longer, giving 260 litres (9.2 cubic feet) of space. It has twin "barn doors," alternately referred to as "the Splitdoor," enclosing the boot instead of a pull-up hatch, and also features a "Clubdoor" on the right-hand side regardless of the intended market. This means that in right-hand drive markets, the rear door is on the road side of the car, requiring rear passengers to exit into the road. Engine and transmission selections are identical to those used in the Hatch/Hardtop model, except the One Diesel; and the rear suspension set-up shares many of the same designs features including the rear trailing arms and the anti-roll bars. The use of the name "Clubman" for the Mini estate van was