The majority of people who buy diesels in the non frugal manner, by it for its pulling power, their is no real petrol equivalent to a diesel but there is always a diesel equivalent to a petrol, you wouldnt pull a tractor with a petrol would you, not only would it be very cost ineffective but it would be very hard wearing on the engine, and with Vauxhalls record breaking diesel engine in the VX220 which is fully capable of taking on any petrol, except sub 4 second cars leads you to think does petrol really have an advantage. Answer no, unless you like to spends heavy on fuel and have infinate cash, the diesel at least 2 to 3 engine capacities below a petrol will out pull any petrol at least 2 to 3 engine capacities above it that alone is a reason for buying it, for the fact that you can litteraly waft past slow traffic without changing down several gear, the die hard petrol heads will say but thats the whole fun with petrol cars, but in truth its fun only part of the time, sometimes it becomes a neusense.
I myself an a great diesel liker but the only reason I chose this petrol was because it had ample pulling power for me considering i come from a 1.4 and it come fully stocked for under £10K on a 51 plate with extended warranty
otherwise I would consider looking in the diesel camp, possibly even different manus
The diesel has come to an age now where the only benifit from buying pertrol is the car is a good £2-3K cheaper but you lose that in petrol costs and general running costs. Think about the logic here which is more benificial to your pockets, a cutting agent or a lubricant.....