A heavily modified 1983 Audi Quattro with decades of ownership history and extensive performance upgrades is drawing attention as it heads toward the final days of an online auction.Photo credit: Cars & BidsFinished in Alpine White over a black interior, the coupe represents one of the rare Audi Quattro models imported to the United States during the early 1980s. The vehicle, commonly referred to as an "Ur-Quattro" by enthusiasts, shows approximately 164,800 miles and carries a clean California title. Bidding has reached $29,150 with several days remaining before the auction closes.The seller is representing the car on behalf of its owner, who reportedly purchased it in 1995 and has added approximately 61,000 miles during more than three decades of ownership. According to the seller, the Quattro was repainted in factory Alpine White in 2016 as part of its ongoing evolution.AdvertisementAdvertisementOriginally introduced as a rally-inspired performance coupe, the Audi Quattro played a significant role in establishing the brand's performance reputation. Arriving in the United States for the 1983 model year, it stood apart from Audi's front-wheel-drive offerings with a turbocharged engine, permanent all-wheel-drive system and distinctive bodywork. Although only a limited number were brought to the American market between 1983 and 1985, the Quattro became one of the most influential vehicles in Audi's history and laid the foundation for the company's future high-performance models.This particular example has been transformed into a dedicated hill climb and track-focused machine through years of development. At the center of the build is an Audi RS2-sourced crate engine, an Audi-designed and Porsche-modified 2.2-liter turbocharged five-cylinder powerplant. In stock form, the engine is rated at 311 horsepower and 302 pound-feet of torque. The upgraded drivetrain also includes an Audi RS2 six-speed manual transmission conversion with a cable-actuated shifter.Additional performance enhancements include a large intercooler, high-capacity radiator with a 500-watt fan system, a custom air intake arrangement, and a stainless-steel turbo-back exhaust system. The car rides on 18-inch Forgeline wheels and benefits from Audi S2 running gear, upgraded suspension components and a performance brake system equipped with switchable ABS functionality.Visually, the Quattro has been dramatically altered through the installation of a carbon-fiber Sport Quattro-style widebody package developed and installed by 2Bennett Audimotive. The race-inspired appearance is complemented by a custom eight-point roll cage with side-impact ladder bars, while the cabin features Recaro racing bucket seats fitted with harnesses.AdvertisementAdvertisementDocumentation accompanying the vehicle includes itemized build sheets, service records and three keys. Service records are available upon request.The vehicle history report reflects no reported accidents or mileage discrepancies during its documented period and shows California registration history, although there is a reporting gap from 2016 to the present.With its combination of rally heritage, extensive engineering modifications and long-term ownership history, this Audi Quattro represents a unique interpretation of one of Germany's most influential performance cars as bidding continues toward the auction's conclusion.Source: Cars & Bids⚡️ Read the full article on MotoriousSign up for the Motorious Newsletter. For the latest news, follow us on Facebook, Twitter, and Instagram.