Which car would you chose and WHY?

I've just sold my XJ8 to a nice old chap from Aberdeen who's paying me 'top whack' and some compliments for the nice example that it is .

Anyhoo - have my sights set on one of two cars. Like them both for different reasons.

Jeep Grand Cherokee Limited 4.7 with LPG...or...Jaguar S-Type 4.0 SE.

Jeep's a lovely metallic green with acres of tan cow and some nasty fake wood.

Jag - silver with black leather and more toys than you can shake a stick at...and some nasty fake wood.

Both OK mileage - good service history and excellent condition. Full MOTs and plenty of tax.

Technical specs courtesy of Parkers so may be a bit sketchy:

JP - 4.7 16v V8 - 0-60 220bhp 8.7sec 124mph 5sp auto

JG - 4.0 32v V8 - 0-60 281bhp 6.6sec 150mph 4sp auto (I was sure it's a 5 speed though)

Overall internal & external sizes are about the same.

Jag a lot more refined, Jeep a bit more fun.

Jag...endless power, Jeep...dirt cheap to run.

it's just so - "apples & oranges", i like both for different reasons. Jeep will be a 'cheap' hoot being LPG...and will probably retain a better resale value. Jag...just friggin' awesome power and no worse on petrol than the present one.

I only ever keep a car for a year tops (much to my wife's dismay) as I find some poor excuse to get another one. (Boot's too small / I've always fancied one of those...etc.)

Really can't find a sensible reason either way - so any notes of experience of either vehicle welcome. At present I'm 55/45 in favour of the Jeep...but then that little voice inside my head that likes kicking the as$ of chavs in corsas has a chuckle.

I don't mean to offend, but please don't mention the phrase 'carbon footprint'...it's just my 'big boy's toy' that'll do minimal mileage - doing my little bit to help warm Britain up.