1991 Audi Models Explained: The Full Lineup, Decoded

TLDR

Audi’s 1991 US lineup had four model lines: the 100 and turbocharged 200 (mid-size sedans and Avant wagons), the compact 80/90 (mid-facelift from B3 to B4), and the two-door Coupe. Every line could be had with Quattro all-wheel drive, and 1991 was the last year for the C3-generation 100/200 before the C4 100 took over in 1992. The one to chase if you find a clean example: the 200 Turbo Quattro 20V, Audi’s last inline-five turbo flagship before the V8 era.

Table of Contents

• Why the 1991 Lineup Confuses People
• Audi 100: The Workhorse Sedan and Wagon
• Audi 200 Turbo Quattro: The Flagship’s Last Stand
• Audi 80/90: Caught Mid-Facelift
• Audi Coupe and Coupe Quattro
• 1991 Audi Lineup at a Glance
• Buying One in 2026: What Actually Matters

Why the 1991 Lineup Confuses People

Audi’s naming in this era wasn’t designed to be intuitive, and 1991 sits at the exact point where two platforms overlapped. Here’s the short version: the number told you the size class, not the year. 80 and 90 were the compact sedan, badged 80 in Europe and 90 in the US regardless of engine. 100 and 200 were the mid-size car, with 200 reserved for the turbocharged, higher-output version. Slap “quattro” on any of them and you had Audi’s signature all-wheel-drive system instead of front-wheel drive.

Then there’s the generation split. Audi called the 80/90’s mid-cycle refresh a jump from “B3” to “B4,” and that refresh landed right in 1991 — meaning a 1991 80 could be either platform depending on when in the model year it was built. The 100 and 200, meanwhile, were riding out the last months of the C3 chassis before Audi replaced the 100 with an all-new C4 car for 1992. None of this is explained on a window sticker. It’s the kind of thing you only piece together after cross-referencing a few chassis codes.

Audi 100: The Workhorse Sedan and Wagon

The 100 was Audi’s mainstream mid-size offering — a sedan and Avant wagon built to be comfortable and unremarkable, the German equivalent of a Camry with a five-cylinder engine option. For 1991, buyers could still get the naturally aspirated 2.3-liter inline-five or the smoother 2.8-liter V6 that Audi had added to broaden the range, in front-wheel drive or Quattro.

It’s the least collectible car in this lineup today, and that’s exactly why it’s worth a look if you just want a usable classic. Parts commonality with the 200 helps, and the Avant wagon version — with its low, flat cargo floor and split-fold rear seat — still functions as an actual daily hauler in a way a lot of ’90s classics don’t.

Audi 200 Turbo Quattro: The Flagship’s Last Stand

This is the one enthusiasts actually search for. The 200 Turbo Quattro 20V used a turbocharged 2.2-liter inline-five making roughly 217 horsepower and 228 lb-ft of torque, routed through a Torsen center differential to all four wheels. Audi also fitted it with an unusual floating-rotor brake design instead of a conventional fixed caliper setup — the kind of engineering detail that made these cars expensive to maintain even when they were new.

1991 mattered specifically because it was the last model year for the C3-based 200 before Audi’s flagship role shifted to the V8-badged sedan and, later, an entirely new S-series. Every 200 Turbo Quattro sold in 1991 was, in effect, the final chapter of a car that traced its DNA back to the original Quattro rally cars of the early ’80s. That lineage is why the Avant wagon version in particular has become a quiet obsession among Audi collectors — few were sold, fewer survive with the turbo drivetrain intact, and a clean one now draws real bidding interest at classic-car auctions.

Fuel economy was never the point, but if you want the official numbers rather than a forum guess, the EPA’s fuel economy data has the original city/highway ratings on file for both body styles.

Audi 80/90: Caught Mid-Facelift

The compact 80/90 is where the B3-to-B4 confusion actually shows up on the car itself. Early-production 1991 cars kept the older B3 body — rounder bumpers, narrower stance, smaller wheel arches. Cars built later in the 1991 model year picked up the B4 refresh: a longer wheelbase, a redesigned rear axle and fuel tank that finally allowed folding rear seats, 15-inch wheels filling out more aggressive wheel arches, and a front end where the grille merges into the hood instead of sitting as a separate piece.

Inside, the B4 cars got noticeably better materials — less of the hard, dated plastic that dates the earlier car the moment you sit in it. European buyers also gained a new turbodiesel option and a pair of V6 engines during this transition, though US 90 models stuck mostly with the familiar inline-five and four-cylinder choices. One more naming wrinkle: Europe dropped the “90” badge entirely once the B4 launched, calling every compact sedan an 80 regardless of engine, while American dealers kept selling theirs as the 90 straight through the B4’s run.

If you’re shopping a 1991 80/90 specifically, check the build date before you check anything else — it tells you more about what car you’re actually getting than the model year does.

Audi Coupe and Coupe Quattro

Built on the same platform as the 80/90 but wearing a lower, two-door body, the Coupe was Audi’s answer to buyers who wanted the sedan’s bones with a sportier shape. The US-spec Coupe Quattro ran a 2.3-liter, 20-valve inline-five making roughly 164 horsepower — down considerably from the turbocharged 200, but naturally aspirated and, by most owners’ accounts, the more rewarding car to actually drive because of how it revs.

It’s also the closest thing in the 1991 catalog to the original Ur-Quattro’s spirit without the price tag that car now commands. Quattro all-wheel drive was optional rather than standard here, so it’s worth confirming before you buy — a front-wheel-drive Coupe and a Coupe Quattro look nearly identical from the outside.

1991 Audi Lineup at a Glance

Model	Body Styles	Engine (1991 US)	Power	Drivetrain	Why It Matters
80 / 90	4-door sedan	2.3L I5 (avail. V6 in Europe)	~130 hp	FWD or Quattro	Caught between B3 and B4 mid-year
100	Sedan, Avant wagon	2.3L I5 / 2.8L V6	130–172 hp	FWD or Quattro	Last year of the C3 chassis
200 Turbo Quattro 20V	Sedan, Avant wagon	2.2L turbo I5	~217 hp	Quattro AWD	Final C3-based flagship
Coupe / Coupe Quattro	2-door coupe	2.3L 20V I5	~164 hp	FWD or Quattro AWD	Sportiest body on the platform

Buying One in 2026: What Actually Matters

None of these cars are appreciating blue-chip collectibles the way an original Ur-Quattro is, but the 200 Turbo Quattro Avant has been climbing steadily as buyers realize how few survived. Everything else in the lineup is still affordable, which is its own kind of trap — cheap purchase price, expensive ownership.

Rust is the first thing to check, full stop. Rocker panels, the rear wheel arches, and the floor pans under the rear seat are where these cars rot first, especially on cars that spent winters in road-salt states. A car that looks straight in photos can still have serious rot hiding under the sound-deadening mat.

Parts availability is the second issue, and it’s a real one. Audi’s US sales had collapsed through the late ’80s — dropping from roughly 74,000 units annually to around 12,000 by 1991 — after the unintended-acceleration controversy scared off buyers, a saga the Center for Auto Safety has documented in detail even though federal investigators ultimately cleared the cars. Lower sales volume then meant a smaller dealer parts network, which means fewer of these components got made in the first place. Turbo-specific parts for the 200, and anything unique to the Torsen center differential, are the hardest to source today — budget for specialist Audi/VW parts suppliers rather than a generic parts-store run.

Check the VIN against open recalls before you buy, especially on a car this old where prior repair history is often undocumented. The NHTSA recall lookup tool covers this generation and takes about thirty seconds to run.

If you want a driver, the 100 or a Quattro-equipped 80/90 is the sensible pick. If you want a piece of Audi history that’ll actually hold its value, the 200 Turbo Quattro — sedan or Avant — is the one worth chasing, rust-free examples and all.