BMW launched the latest addition to the 1 Series line-up, the 1 Series Coupé (E82), at the Internationale Automobil-Ausstellung (IAA) 2007. The car went on sale on 24 November 2007. The flagship of the range will be the 135i with a 3-litre twin-turbo petrol engine, generating 225 kW/306 hp (DIN) with its six cylinders. This model also comes with a modified M sports package as standard. The 123d (150 kW/204 hp(DIN)) heads up the range of diesels and is the first ever 4-cylinder diesel engine to come with variable twin-turbo technology. In terms of fuel consumption, the 123d and 120d rate between 4.8 L/100 km (59 mpg imp/49 mpg US) and 5.2 L/100 km (54 mpg imp/45 mpg US).
On June 27, 2007, BMW released official information about the new upcoming 1-series Coupé. In Europe, the Coupé would be available fall 2007 in 3 engine specifications: the known 120d and the new 204 hp 123d and 306 hp 135i, both twin-turbo engines.
On 30 June 2007, BMW of North America officially announced the 1-Series Coupé as a 2008 model (code named E82) and that will be the first 1 Series to go on sale in the USA. Two models are initially to be offered: the 128i and the 135i. The 128i will be powered by a 3.0 liter, 230 horsepower (170 kW) inline six cylinder engine. The 135i Coupé will be propelled by a 300 horsepower (220 kW), twin turbocharged 3.0 liter inline six cylinder engine.[15] Both engines are shared with 3-series models 328i and 335i.
Like the three- and five-door BMW 1 Series models, the E82 also features various BMW EfficientDynamics components to reduce fuel consumption (see below). The Coupé is 133 mm (5.2 in) longer than the hatch, creating 20 litres of extra boot space. It is 220 mm (8.7 in) shorter than 3-series Coupé (E92). 120d, 123d and 135i Coupés’ announced unladen weights (EU) are 1450, 1495, and 1,560 kg (3,400 lb), respectively (corresponding to approx. 3,285 lb (1,490 kg) curb weight for the 135i – a 90 lb (41 kg) reduction from the 335i Coupé).
The 1 Series Coupé is marketed in the US as a spiritual successor to the legendary BMW New Class with its long bonnet, slim cabin and short rear. Apart from slight modifications, it uses the same nose design as the rest of the 1 Series so as to ensure some visual consistency within the range.
In July 2007, BMW announced they would be exporting the 128i and 135i Coupés to the United States in Spring 2008. The 135i is priced about $6,000 less than the 335i Coupé .
It has been said that the BMW 1 envokes memories of the E36 BMW, as stated in both Road and Track and Car and Driver Magazines.