Audi 191ci Specs: 84.5 x 92.8 mm

Audi 191ci specs: 84.5 x 92.8 mm (3.3268 x 3.6535 in) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	191 ci
Cylinders	6
Bore	3.327"
Stroke	3.654"
Compression	12.5:1
Advertised power	255 hp
Years	2005–2009

This engine

Engine	Displacement	Bore × Stroke	CR	HP
AUK / BKH	191 ci	3.3268" × 3.6535"	12.5:1	255

Factory cars with a Audi 191ci

• Audi A4 / S4: 2005, AUK / BKH, 255 hp; 2006, AUK / BKH, 255 hp; 2007, AUK / BKH, 255 hp; 2008, AUK / BKH, 255 hp; 2009, AUK / BKH, 255 hp

What varies across the family

This family is represented by a single engine in the database: 191 ci, 6 cylinders, a 3.3268" × 3.6535" bore and stroke.

All are undersquare — stroke larger than bore, favouring torque low in the range.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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