I can't see why not. Difference is basically in the gear ratios. TDI boxes will give longer gears and better economy, petrol boxes shorter gears and better acceleration. Needless to say that each box needs to be paired with suitable ratio rear diff.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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