I thought the 6hp difference to the KE was down to the exhaust manifold.
Peak torque was away up the rev range at ~4500rpm or higher which was probably why it didn't last long. KV was much more flexible.
Pretty sure I've got an old VW Audi test article on the 80q from 1983 if it's any help
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1991 90 quattro 20v sport
1991 90 quattro
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