[urq] Why audi I5 started as 2.1 liters - Audisport HistoricalTrivia

[John Koenig]

Interesting.  Some of the first Porsche 911 turbo competition cars
('75-'76?) were ~2.1 liters for the same reason -- the 1.4 factor for
turbos, and the 3.0 liter limit.


----- Original Message -----
From: <QSHIPQ at aol.com>
Subject: [urq] Why audi I5 started as 2.1 liters - Audisport
HistoricalTrivia


> Now comes the engine history.  Turbocharged cars were allowed by FIA, but
they were displacement corrected against the normally aspirated cars.  This
adjustment was known in FIA as 'equivelency'.  The number assigned to
equivelency on Group4>GroupB competition turbo car: 1.4.  This was a key
number to Audi AG in I5 construction and displacement.
>
> Scott Justusson