The Jazz has 2 engine options - the 1.2 litre petrol though has been borrowed from the Brio but has a slightly higher power output of 89bhp though is tuned for efficiency. You can opt for either a 5-speed manual gearbox or a CVT with paddle shifters. We did spend most of our time with the diesel variant and so look out for a more detailed review of the petrol twins soon on NDTV Auto. The 1.5 litre i-DTEC diesel engine puts out exactly the same figures(98bhp, 200 Nm) as the diesel City’s because of course it’s the same motor and also gets the same 6 speed manual.What you won’t notice even if you look hard is the changes to the dimensions of the car which is slightly longer by 55 mm and wheelbase marginally up by 30 mm. So open the doors and you will enter a cabin, which is XXL in space, at least for a hatch this size. And that really is the ultimate USP in this segment isn’t it? The wheelbase is longer than the old car’s and so space inside the cabin has improved quite a bit. The hatch can easily seat 5 but the centre portion of the rear seat has a raised section which isn’t too comfy. Headroom, knee-room, shoulder-room are all quite good but under thigh support in the rear seats could have been better.The fuel efficiency numbers of the Jazz are impressive with the diesel engine claiming 27.3Km/l, just 0.3Kms behind the newly launched Maruti Celerio diesel, making it one of India’s most fuel efficient car. The petrol CVT delivers 19Km/l, while mileage claims on the manual are at 18.7Km/l.