Jaguar arrived at Company Car in Action with a more compelling prospect for user choosers an fleets, announcing a CO2 reduction for the XF.
A revised version of the 2.2-litre diesel engine for the 2014 model year will allow fleets to choose a 129g/km version of the saloon and the Sportbrake estate.
The 163bhp version of the engine in conjuction with the standard 17-inch wheels has CO2 emissions of 129g/km whether choosing four- or five-door models, while fuel consumption has been reduced to 57.7mpg.
The revisions are timely following the changes to the thresholds for enhanced write down allowances that came into effect in April, which treat cars more favourably with CO2 emissions of 130g/km or less.
The engine, which has been designated ECO2, works in combination with an eight-speed automatic transmission, has new larger exhaust gas recirculation valves and a revised cooling assembly which combine to reduce emissions figures by a further 6g/km of CO2 over the 2013 Jaguar XF.
The revisions include a twin-solenoid starter for quicker restarts under stop/start conditions.
Jeremy Hicks, managing director of Jaguar Land Rover UK said: "The 2014 XF with this revised engine calibration opens up the unique Jaguar ownership experience to a whole new segment. Cost-conscious drivers, business users and fleet managers will be able to enjoy the refinement, luxury and seductive design of a Jaguar while benefiting from its low emissions and high fuel efficiency."