Spy photographers have captured BMW’s 2 Series convertible being tested virtually undisguised. The 2 Series convertible will be based on the 1 Series hatchback from which it will borrow its technology and engine line-up. As for design language, BMW has promised to make the 2 Series a little sportier.GALLERY: 2014 BMW 2 Series convertible (Spy)It will be powered by four-cylinder engines and the line-up will consist of a two-litre petrol engine with 111kW, 132kW or 162kW, and a two-litre turbocharged diesel engine capable of 159kW. Engines will be mated to either a six-speed manual transmission or an optional eight-speed auto. BMW’s xDrive system will be available as an option on the 2 Series. The upcoming BMW 2 Series convertible is set to be unveiled later in 2014.