BMW has revealed the next generation of one of its longest running SUVs – the X3. The new X3 has been completely redesigned with a heavily revised exterior and interior, as well as being offered with an improved plug-in-hybrid powertrain. The new plug-in-hybrid 30e xDrive model is powered by a 2.0-litre four-cylinder petrol engine mated to electric motor and eight-speed Steptronic automatic gearbox. This generates a total power output of 294 hp and can now achieve up to 90 km on electric power alone. All models come as standard with four-wheel-drive and the petrol engine models all come with a…