The five-cylinder 2.7-litre unit from the Mercedes ML range replaces the nasty 3.1-litre turbodiesel, which was the only alternative to the gas-guzzling petrol engines. It makes Jeep ownership a sensible economic proposition at last. The unit propels the heavy 4x4 with surprising ease - a 0-60mph time of 11.2 seconds is 2.3 seconds quicker than the old 3.1 TD and only slightly slower than the 4.0-litre petrol. However, that car returns 19.1mpg and the CRD will manage 27.9mpg.
Yet although the engine is competitive, the rest of the car has now fallen behind rivals. Its low-tech chassis means BMW's X5 or the Land Rover Discovery are better. But while the handling might make occupants green, the equipment could turn X5 drivers the same shade in envy. At
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