A 1. L engine is generally sufficient for everyday driving and city commuting in the UK. For motorway driving, performance depends on the vehicle size – smaller cars like the Volkswagen Polo handle well, while larger vehicles may need more power. If you’re aiming for fast acceleration and journeys at prolonged high speeds, engine sizes of 2. Drivers who aren’t as fussed about long journeys or high speeds can’t go wrong with smaller engine sizes.The 1. Jtd is one of the biggest collaborations among manufacturers and can be found in: alfa romeo, chevrolet, chrysler, citroen, fiat, ford, opel, peugeot and suzuki. While the multijet is regarded as a robust engine, it is not without its faults. Compared to the first-generation jtd engines (unijet system) which only featured a smaller pilot and a larger main injection, multijet is capable of up to five injections per combustion cycle which enables better, more efficient cold running, better performance especially in the lower rev-range, quieter operation as .