LEXUS may be playing around with petrol/electric hybrids but it's always imperative to have an oilburner in the wings too for the high-mileage drivers looking for economy.

It's taken some time to see a diesel unit in the Lexus line-up and at the moment it's restricted to the entry-level IS range.

The IS is worthy of the badge and the smallest Lexus is every bit as luxurious as its larger siblings.

In no way is it a poor relation and the stylish lines and modern look give it a unique appeal.

The petrol version is a cracker, smooth and sophisticated, powerful and refined, so the diesel has a fair bit to live up to.

Lexus 220D is no ordinary diesel and it certainly takes a bit of getting used to. It is surprisingly sluggish off the mark thanks to amazingly high gearing.

Pull out from a roundabout or junction and it seems to take an age to reach the powerband at about 1,700rpm before it takes off like a rocket.

Liberal use of the six-speed gearbox is a must otherwise it will dump you in a big fat power vacuum that leaves it feeling breathless.

It's essential to change your driving style. The diesel actually thrives on revs. Keep the rev counter needle above 2,000rpm and it is fine but my natural gear-changing tended to dump me in a hole.

Top gear is the highest ratio I have ever experienced. The IS measures 45mph per 1,000rpm and will just about pull sixth at the legal limit of 70mph. Anything less, forget it.

With 70 on the clock the needle is just about on 1,700rpm so come any sort of gradient, if you don't catch the throttle in time you are going to have to change down.

With so few beats from its heart you would expect the diesel to sip frugally from the fuel tank. But the 38mpg I averaged is a bit below par given the economy of much of the competition.

The engine is smooth and refined and when cruising can barely be heard, which is what you would expect from a Lexus.

The rest of the IS is excellent.

Spec is off the sheet and the smart, modern interior oozes quality. The sound system is one of the best I have heard.

Handling is excellent too and leans towards the sporting, though ride is comfortable and refined.

The IS220D has many strengths but needs to be tried and tested as it is an unusual drive.

It certainly grows on you as time passes by but whether it is a real alternative to the petrol is another matter.