For 1993 models onwards:
Overall length
- S4; USA S4S; GT3. '98 V8, Sport 350 4369 mm (172.0 in)
- non-USA S4S; '96 & '97 V8 4414 mm (173.8 in)
- Sport 300 4391 mm (172.9 in)
Overall width - excluding mirrors
- S4; USA S4S; GT3 1867 mm (73.5 in)
- non-USA S4S; V8 1883 mm (74.1 in)
- Sport 300 1900 mm (74.8 in)
Overall width - including mirrors
- all; 1981 mm (78.0 in)
Overall height - at kerb weight
- S4; S4S; V8; GT3 1150 mm (45.3 in)
- Sport 300 1164 mm (45.8 in)
As said above, the rear spoiler affects length and the width (excl. mirrors) difference is due to wheel arch extensions.
Overall length
- S4; USA S4S; GT3. '98 V8, Sport 350 4369 mm (172.0 in)
- non-USA S4S; '96 & '97 V8 4414 mm (173.8 in)
- Sport 300 4391 mm (172.9 in)
Overall width - excluding mirrors
- S4; USA S4S; GT3 1867 mm (73.5 in)
- non-USA S4S; V8 1883 mm (74.1 in)
- Sport 300 1900 mm (74.8 in)
Overall width - including mirrors
- all; 1981 mm (78.0 in)
Overall height - at kerb weight
- S4; S4S; V8; GT3 1150 mm (45.3 in)
- Sport 300 1164 mm (45.8 in)
As said above, the rear spoiler affects length and the width (excl. mirrors) difference is due to wheel arch extensions.