Audi S6
Audi made a high-performance, 4.2-litre V8 engine (parts code prefix: 077, identification code: AEC) with a Bosch KE-Motronic ECU available as an option in the original European S4s, and made the decision to continue to do so with the S6, making a version of the 4.2 available as an optional upgrade over the 2.2-litre inline five-cylinder turbo. Unlike the five-cylinder turbocharged version, the V8-powered S6 was supplied with a four-speed automatic transmission as standard, but kept the quattro four wheel drive. A six-speed manual gearbox was also available as an option.
Audi S1
The Audi S1 is Audi's smallest S model car and a performance version of the Audi A1. The first variant (Typ 8X, produced from 2010 to 2018) has 228 hp (231 PS / 170 kW) derived from the Volkswagen group's EA888 2.0 litre turbo four cylinder, and permanent quattro four wheel drive.