Name given to the special competition versions of production models, sometimes with roller-bearing crankshaft Anzani engines and sometimes with supercharges. The last of these cars (illustrated above) was a 'one-off' prototype with a special centre-drop frame and an overall lower build.
- 1496cc (S4 SV)
- Front engine, rear-wheel drive
- Production dates:
- 1926 to 1932
- Number produced: