Jaguar XF gets four cylinder diesel
2.2-litres take emissions below 150g/km CO2
- Published in News.
Thinly disguised improvement: downsized diesel gets Jaguar XF to 149g/km
Jaguar is finalising development of the most efficient XF yet. Adding a four cylinder diesel to the range will allow the firm’s executive sedan to better compete with models from Audi, BMW and Daimler.
The 2,179cc unit develops 140kW/ 450Nm. Combined with a stop-start system and a ZF eight-speed automatic transmission, the powertrain enables the XF to return fuel consumption and emissions on the NEDC cycle of 5.4 litres/100km and 149g/km CO2.
The high torque output should deliver good driveability but the firm’s engineers also want low levels of NVH. Jaguar said: “We put particular emphasis on sound deadening around the engine and bulkhead as well as active engine mounts to reduce vibration. The result is a3dB reduction in cabin noise to make the car one of the most refined vehicles in its class.”
The engine is a development of the Ford/PSA diesel used in models such as the Land Rover Freelander, Ford Mondeo and Peugeot 508. It features a single variable geometry turbo and Bosch commonrail injection system.
Benchmarks for the Jaguar XF are the BMW 5 series and Mercedes E-Class. The BMW 520d has a 1,995cc engine developing 135kW and 380Nm. Using the same basic transmission as the Jaguar, it consumes 5.2 litres/100km and emits 137g/km CO2.
The E220 CDI’s 2,143cc engine develops 125kW and 400Nm but comes with a five-speed automatic; consumption and emissions are 5.8 litres/100km and 154g/km.
As reported in the March 2010 issue of Automotive Engineer, Jaguar’schief powertrain engineer Ron Lee expects more complex boosting systems, further engine downsizing and advances in transmission technology, together with vehicle weight reduction, to get the XF to130g/km by 2016 and just 100g/km by 2020.
