Report: Next-gen BMW 1-series to get four new variants

While its Mini dealerships expand and BMW plans to double North American production, it's even busier behind the scenes working on the next generation of its most compact platform. Four new BMW 1-series variants are rumored to be in the works for the next-gen model, known internally as the F20, in addition to the traditional coupe and hatch already in production.

The new variants include a new version of both the Coupe and Cabrio, a GT-style Estate, and a crossover-like vehicle possibly wearing a Y1 badge. A roadster version called the Z2 and potentially a small coupe version of that car are also up for production, reports Autocar. Bringing the car to market now is thought to make sense both from a consumer perspective and for competitive reasons - Volkswagen is also reported to be going forward with the Bluesport roadster, which may also share its underpinnings with entry-level Porsche and Audi roadsters.

So far the GT-style Estate and the crossover-like variant are still only possibilities, without official approval. A four-door sedan-profile car on the 1-series platform is also among the talk.

The next-generation 1-series is expected to include a range of powertrains. A 1.3L three-cylinder turbocharged petrol engine could replace the current 1.6L four-cylinder. If so, in Europe at least, five petrol models should be available: the 116i with a 136hp (101kW) 1.3L turbo; the 118i with a 177hp (132kW) 1.3L turbo; the 120i with a 218hp (162kW) 2.0L turbo; the 130i with the 272hp (203kW) naturally-aspirated 3.0L inline six; and the 135i with a 326hp (243kW) turbo six-cylinder.

The diesel range will be somewhat more compact with a 118d featuring a 150hp (112kW) 2.0L turbodiesel, a 120d with a 184hp (137kW) 2.0L turbodiesel and a 123d with a 211hp (157kW) 2.0L turbodiesel.

A series of high-performance 'ti' models could also come with design assistance from the M Division, though exactly what shape those might take is still up in the air.

BMW's Megacity urban vehicle project, which had previously been linked to the next-gen 1-series, will not play a role in the coming lineup. The Megacity project is independent of the 1-series because of the unique nature of its design goals.

According to previous reports, the first model released - the five-door hatch - will hit the market around 2011, while the top-end model will wait until early 2012 to make its debut, while the standard coupe will come toward the end of 2012. A cabrio will come in early 2013 as the last of the certain-to-be-produced models.