Had both. Similar issues/ maintenance costs. In anything resembling a work or heavy duty vehicle, the V10 hands down.
^^ that motor is quite de-rated from the factory. A chip and a blower will turn it into a beast. A mate of mine had one in a Superduty and it hauled ***....
Not sure I get the logic there. A 7.3 idi is quite de-rated from the factory but a turbo kit and a couple grand in other stuff will turn it into a beast.
Doesn't change the fact that from the factory it's a slug. A 5.4 against the 6.8 is a slug as well. It works fine in an F150 or something, but in a Superduty against another Superduty with a 6.8, it's no contest. I had that combo, at the same time. An F150 with the 5.4 and an F250 with the 6.8. Start loading them up and it was no comparison.
First, no 7.3 IDI in a SuperDuty (where 5.4 and 6.8 and 7.3 PSD were available). I don't
think that's what you were saying just making it clear for those following along.
Second, did your F150 and F250 have the same body-styles, transmissions, R&P ratios, tire sizes, etc? If not this is hardly apples v. apples.
Third, yes, a 6.8 will outperform a 5.4. If that surprises you, get a clue. The reasons they were purchased instead of other powerplants include the fact they were the standard engine (not an extra cost option), were more common in dealer inventory (no special ordering required), had higher EPA mpg estimates, had lower maintenance costs (8 vs 10 spark plugs, coils, etc).
Finally, ****** does this have to do with MG's van build? GTFO with all this blabbing. If this was PBB I'd have double birds *here*