Spy photographers have captured the BMW 2 Series Cabrio testing with the roof open. The car will be based on the 1 Series hatchback - borrowing its technology and engine line-up. As for its design, BMW has promised to make the 2 Series sportier.Image galleryIt will have four-cylinder engines and the lineup will consist of a two-litre petrol engine with 111, 132 or 162kW, and a two-litre turbocharged diesel engine with 159. All of the engines will mate to either a six-speed manual transmission or an optional eight-speed automatic. The upcoming 2 Series Cabrio is set to be unveiled in 2014.