Fiat 500 Hybrid is the first mild hybrid small city car

The new mild-hybrid engine is a 1.0-litre three-cylinder turbocharged petrol engine. It has two valves per unit, the weight is just 77 kg, it delivers 70 hp at 6,000 rpm and has a torque of 92 Nm at 3,500 rpm. 

The BSG system is mounted directly on top of the engine and is driven by a belt. The system recovers energy when the car brakes or decelerates and stores it in a lithium battery with a capacity of 11 Ah. The energy is used to restart the engine at Start & Stop driving and to assist the engine as the car accelerates. The new mild-hybrid engine is combined with a six-speed manual transmission that ensures good driving performance and lowers gasoline consumption when driving on land and highways. The entire engine is also lowered 45 mm to give a lower centre of gravity and to ensure that the car is better on the road.

The mild-hybrid engine means that the petrol engine turns off automatically when the car is put into neutral - even at speeds below 30 km / h. Instead, the car gets all the energy from the lithium battery, ensuring that the driver has complete control of the car and driving.

In many countries, this type of car is subject to benefits such as cheaper access to urban environmental zones, cheap parking and lower taxes.