Jaguar has launched an Euro IV-compliant engine for its X-type diesel sedan and wagon models a year ahead of the date demanded by legislation.


Parent company Ford already offers Euro IV variants of the Jaguar engine in its Mondeo model line.


Jaguar is charging British buyers £500 ($US939) extra for the ‘cleaner’ engine but claims it offers improved driveability and more responsive performance – and qualifies for a lower rate of UK road tax.


“Compliance with the forthcoming 2006 Euro IV emissions regulations brings business and corporate users in the UK a potential reduction in their annual company car tax bill of around 3%, which comes a year ahead of the ruling,” Jaguar said.


Peak power and torque of the X-type diesel remain at 130PS and 330Nm, but there are a number of modifications. A new engine management calibration has been introduced in order to provide a better throttle response and an electronic vane control device has been added to the turbocharger, bringing better driveability due to the improved reaction time of the electronic system compared with the previous vacuum system.

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These changes mean that the engine and vehicle react faster to driver demand for more throttle, giving a feeling of eagerness and increased responsiveness. EU4 emissions have been achieved on the X-type without the need for a particulate filter.


Jaguar’s corporate operations manager, James Drake-Lee, said: “The introduction of this new engine recognises the significance of the Jaguar X-type in the UK fleet sector.


“[It] has always been an extremely competitive proposition in the business market, which has already led to record corporate sales numbers of over 10,000 this year. The EU4 emission compliant [version] will continue to offer everything the executive expects from the premium sector but with personal tax efficiency included in the package.”


Fuel consumption and CO2 figures have changed slightly as a result of achieving the improved emissions – in the combined EC test cycle the fuel consumption for the sedan is 49.1mpg and for the wagon 48.5mpg. The CO2 emission figure for the sedan increases from 149g/km to 152g/km but the wagon remains at 154g/km. Therefore the wagon gains the full benefit of the 3% reduction in company car tax while the sedan improves by 2%.


These changes mean that a 40% taxpayer in the UK will pay £11 less company car tax a month for driving a ‘Classic’ sedan and £19 less for the wagon version.