The 103 motors that were put in the r129 SL were rated at 190hp. How were the extra 13hp achieved over our US car. I see the euro 103 motors are rated between 179-188hp in other applications.

Also, what transmission did the r129 300SL with the 103 motor use?

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E