Jaguar XJ Diesel still Britain’s Greenest Luxury car
14 Jun, 2008
13 Comments 
“For a proper luxury car to achieve 1000.2 miles (1609kms) on a single tank of diesel is simply remarkable. It’s enough to make you want to buy one”
-Anthony Crawford
The 2.7-litre diesel engine in the XJ series is a robust powerplant which can move the car along rapidly if need be, but at the same time, is capable of achieving a mind-blowing 53.5mpg (4.4-L/100kms).
I mean we are not talking about a frugal little 5-speed manual four cylinder bread box but rather, one of the most luxurious cars in the category with an interior more akin to a five star hotel fit out, than a four door sedan.
Moreover, the big Jag’s CO2 emission count of 139g/km is so low for a car of these dimensions I had to re-examine the calculations. Again this level of carbon pollution is more like what you would expect of a small econobox, than a lavishly appointed flagship model in the large car category.
Incidentally, the diesel engine is a twin turbo unit and the entire car is made from aluminium, but still weighs in at 1659kg. And it’s not slow either. How’s 0-100km/h in 8.2 seconds and a top speed of 225km/h.
Well-done Jaguar!
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June 14th, 2008 at 4:39 am
Just goes to support the poitnby another poster here (Realcars?) that diesels are by no means at the end of their development cycle.
Also that high efficiency does not necessarily mean weird dorky slow vehicles.
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June 14th, 2008 at 10:08 am
what do these cost???
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June 14th, 2008 at 10:39 am
Would like to see this engine in the Falcon.
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June 14th, 2008 at 10:45 am
In the Falcon and definitely in the Territory. In fact, it should have been introduced into the Territory line up at least 12 months ago.
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June 14th, 2008 at 10:53 am
I’m very impressed with Jag, this kind of sticks the finger up Toyleta’s Golf Cart tired old technology, a large car returning excellent fuel cosumption figures and looks a million dollars to..
I would love if this engine was included in a Falcon also. Kick hybrids to the Kerb..
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June 14th, 2008 at 11:53 am
I think this must have been achieved by doing mostly highway driving. Still an impressive result though. The Audi A8 3.0TDI should not be that far off the mark either.
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June 14th, 2008 at 12:39 pm
And best of all not only is this Jaguar frugal but you don’t even have to run it on fossil fuels:
According to the Ananova website:
**Inventor turns dead cats into diesel
A German inventor says he’s found a way to make cheap diesel fuel out of dead cats.
Dr Christian Koch, 55, from Kleinhartmannsdorf, said his method uses old tyres, weeds and animal cadavers.
They are heated up to 300 Celsius to filter out hydrocarbon which is then turned into diesel by a catalytic converter.
He said the resulting “high quality bio-diesel” costs just 15 pence per litre.
Koch said the cadaver of a fully grown cat can produce 2.5 litres of fuel - meaning around 20 cats are needed for a full tank.
He said: “I tank my car with my own diesel mixture and have driven it for 105,000 miles without any problems.”
Annelise Krauss of the Dresden Animal Protection Association blasted Koch’s new diesel though, saying: “This is as bad as experimenting on animals.”**
imagine that, a jaguar with real cat power.
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June 14th, 2008 at 3:59 pm
8.2 0-100 isn’t super fast, but that is outstanding fuel economy. Better than the Lexus overly complicated hybrid.
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June 14th, 2008 at 5:16 pm
Here we go again. How Sloooowwww can you go? This reminds me of Clarkson’s ridiculous crawl from London to Edinburgh and back in an A8 TDI. No argument that the Jaguar and its engine are both wonderful, but the real-world economy potential of this combination is more like 7.5L/100km (38mpg), driving at normal speeds. This is still remarkable for something so luxurious, so why promote such pointless achievements?
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June 14th, 2008 at 5:58 pm
My current issue of Top Gear says that it does 34 MPG and emits 214 grams per km. Still excellent for a car ths size but I’d like to hear more and also where you got this info. I dont know if theyve done some tweaking but thats alot of tweaking for an engine thats about 10 years old (to my knowledge). This just doesnt seem right also because if they could do this to the engine than the RR Sport should have much much better CO2 and MPG but it doesnt. I guess that all the people who want this engine in the ford arnt gonna get it now! Kinda sucks really… but they dont have ties to ford anymore and I dont think that ford can use the engines now that TaTa have them. Not sure.
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June 16th, 2008 at 3:23 am
if Ford could achieve these fuel efficiency numbers in a Falcon and Territory then it will have a real alternative to the “petrol” hybrids planned by GM and Toyota for our market!….BUT…..Ford must not put anything less than a state of the art diesel in these cars or it will lose the battle against the hybrids!!!
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June 16th, 2008 at 9:09 pm
Aawww Come on Captain you old sourpus. Take the result as an indication of the wonderful fuel efficieny of a diesel engine.
Oh by the way Jaguar are shortly to replace this wonderful engine with a 3.0 litre version.
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June 16th, 2008 at 9:15 pm
We heard it from good authority that the 3.0 unit is a dead set cracker!
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