d turbo/gti 6 or hdi 306

[ally406]

I'm a huge XUD fan, but as you mention you aren't doing many miles and you have a works van, the obvious answer is get a 6. Keep the 6 standard, maybe refresh suspension components and do some general restoration type work. You will likely find it will increase in value during your ownership. Buy an XUD/HDI and you could spend huge amounts wringing out more bhp, none of which you will get back at resale, so in reality the 6 is the cheaper car total cost of ownership wise, the most reliable and the better drive. If you want to take a car to a B road or track, a petrol has fundamental benefits that a diesel can never have, don't get too hung up on which has more bhp.