The Audi ADA is a 2,771 cc, V6 petrol engine produced between 1991 and 1994. It was engineered as a smooth, naturally aspirated powerplant for Audi's executive sedan lineup, featuring single overhead camshafts (SOHC), multi-point fuel injection (MPFI), and a cast-iron block with aluminium heads. It delivered 132 kW (180 PS) and 255 Nm of torque, providing balanced performance for highway cruising and urban driving.
Fitted to the Audi 100 (C3) and Audi 200 (C3) models, including the 100 2.8 E and 200 2.8 E variants, the ADA engine was designed to offer refined, comfort-oriented performance with predictable throttle response and linear power delivery. Emissions compliance was achieved through a three-way catalytic converter and lambda control, meeting Euro 1 standards across its production run.
One documented concern is premature wear of the timing belt tensioner, which can lead to belt slippage or failure. This issue, referenced in Audi Service Bulletin 01.1 93, is attributed to early tensioner design and material fatigue under prolonged heat exposure. Audi issued revised tensioner components in 1993 to improve durability, particularly in high-temperature operating environments.
Production years 1991–1994 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/5678).
The Audi ADA is a 2,771 cc V6 petrol engine engineered for executive sedans (1991–1994). It combines SOHC valvetrain architecture with multi-point fuel injection to deliver smooth, linear power delivery and driver comfort. Designed to meet Euro 1 emissions standards, it balances refinement with mechanical reliability in pre-OBD-II era applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,771 cc | |
| Fuel type | Petrol | |
| Configuration | V6, SOHC, 12-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.5 mm × 82.0 mm | |
| Power output | 132 kW (180 PS) @ 5,800 rpm | |
| Torque | 255 Nm @ 3,500 rpm | |
| Fuel system | Bosch Motronic MPFI | |
| Emissions standard | Euro 1 | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interval: 90,000 km) | |
| Oil type | SAE 10W-40 (API SH/CD) | |
| Dry weight | 168 kg |
The V6 layout provides smooth, vibration-free operation ideal for long-distance driving but requires strict adherence to 90,000 km timing belt service intervals to prevent catastrophic engine damage. SAE 10W-40 oil meeting API SH/CD standards is recommended for thermal stability and valve train protection. High-load operation in hot climates increases tensioner wear risk, making the 1993-updated tensioner assembly essential for longevity. Fuel system longevity depends on clean fuel and regular injector inspection. Post-1993 models benefit from revised tensioner design; pre-1993 units should be retrofitted per Audi SIB 01.1 93 to prevent belt failure.
Oil Specs: Requires SAE 10W-40 (API SH/CD) specification (Audi SIB 01.1 93). Compatible with ACEA A2/B2 standards.
Emissions: Euro 1 certification applies to all ADA production models (1991–1994) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Output consistent across all markets (Audi Group PT-1992).
Audi Technical Information System (TIS): Docs A31005, A31210, SIB 01.1 93
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585:1992 Road vehicles — Engine test code — Net power
The Audi ADA was used across Audi's C3 platform with longitudinal mounting. This engine received platform-specific adaptations-shorter accessory drives in the 100 and enhanced cooling in the 200-and from 1993 the updated tensioner design improved timing belt reliability, creating service part interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the exhaust manifold (Audi TIS A31050). The 8th VIN digit indicates engine type ('A' for ADA series). Pre-1993 models use early-design tensioner with ribbed housing; post-1993 units feature revised tensioner with reinforced pivot. Critical differentiation from ABK/ABC: ADA has Bosch Motronic MPFI with round ECU connector, while ABK uses square connector. Service parts require production date verification - timing kits before 08/1993 are incompatible with later units due to tensioner redesign (Audi SIB 01.1 93).
The ADA's primary reliability risk is timing belt tensioner failure on pre-1993 builds, with elevated incidence in high-temperature climates. Internal Audi quality reports from 1994 noted a significant number of pre-revision engines requiring belt replacement before 80,000 km, while VCA field data links timing-related failures to missed service intervals. Extended operation in stop-start traffic increases thermal cycling stress, making adherence to maintenance schedules critical.
Analysis derived from Audi technical bulletins (1991-1995) and UK DVSA failure statistics (1995-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI ADA.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with AUDI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialAUDI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
