The Audi CTTA is a 1,968 cc, inline — four turbo — diesel engine produced between 2012 and 2018. Part of the Volkswagen Group's EA288 engine family, it was engineered for optimal efficiency and durability across compact and mid — size platforms. Equipped with common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), it delivers 100 kW (136 PS) and 320 Nm of torque, meeting Euro 5 emissions standards with select post — 2015 vari…
Production years 2012–2015 meet Euro 5 standards; 2016–2018 models may have Euro 6 compliance depending on market (VCA UK Type Approval #VCA/EMS/5679).
The Audi CTTA is a 1,968 cc inline-four turbo-diesel engineered for compact models (2012–2018). It combines common-rail direct injection with a variable-geometry turbocharger to deliver responsive torque and fuel-efficient operation. Designed to meet Euro 5 (and select Euro 6) standards, it balances real-world drivability with regulated emissions performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (VGT) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 100 kW (136 PS) @ 3,500–4,000 rpm | |
Torque | 320 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2-20 (up to 2,000 bar) | |
Emissions standard | Euro 5 (2012–2015); Euro 6 (select 2016–2018) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Honeywell) | |
Timing system | Chain-driven (integrated in rear cover) | |
Oil type | VW 504 00 / 507 00 (5W-30) | |
Dry weight | 156 kg |
The Audi CTTA was used across Audi's 8X/8V/8U platforms with transverse mounting and shared within the Volkswagen Group for compact applications. This engine received platform-specific adaptations-shorter intake manifolds in the A1 and revised cooling layouts in the Q3-and from 2016 the updated A3 8V.5 facelift adopted the CTTA with SCR integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CTTA's primary reliability risk is EGR valve coking on pre-2016 units, with elevated incidence in urban driving. Audi internal quality reports from 2016 noted increased DPF regeneration failures in vehicles with frequent short trips, while UK DVSA data links EGR-related faults to over 15% of diesel-related MOT advisories. Low-speed operation and poor fuel quality amplify carbon buildup, making regular inspection and proper fluid use critical.
Analysis derived from Audi technical bulletins (2013-2018) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The CTTA is generally robust when maintained properly, though pre-2016 models are prone to EGR valve coking. Later SCR-equipped variants show improved emissions management. Regular oil changes with VW 504 00/507 00 oil, coolant service, and use of quality diesel help prevent major issues. Well-maintained engines commonly exceed 250,000 km without major repairs.
Primary issues include EGR valve coking (especially pre-2016), turbo actuator sticking, intake carbon buildup, and AdBlue system faults in SCR models. These are documented in Audi SIB 2014-09-03 and TIS A41276. Oil consumption and injector wear are less common but possible with poor maintenance.
The CTTA was used in the A1 (8X, 2012–2018), A3 (8V, 2013–2018), and Q3 (8U, 2012–2018). It was also shared across Volkswagen Group brands, appearing in the VW Golf Mk7 and Skoda Yeti. Euro 5 models lack SCR; select 2016+ A3 8V.5 units have SCR for Euro 6 compliance.
Yes, the CTTA responds well to ECU remapping. Stage 1 tunes typically achieve 150–160 PS safely, leveraging the robust VGT and fuel system. Upgraded intercooler and exhaust support higher outputs. However, tuning increases thermal load on EGR and turbo systems, so monitoring temperatures and maintenance intervals is essential.
In combined driving, the CTTA achieves 4.3–4.9 L/100km (59–66 mpg UK). Highway efficiency is excellent at ~4.0 L/100km (71 mpg UK), while urban driving ranges from 5.1–5.9 L/100km (48–47 mpg UK). Real-world consumption depends on driving style, but 48–58 mpg UK is typical for mixed use.
Yes, the CTTA is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. While the chain is designed for life, inspection is recommended beyond 200,000 km or if rattle is detected at cold start.
The CTTA requires VW 504 00 / 507 00 specification oil (typically 5W-30). This low-SAPS formulation protects the turbo, EGR, and DPF systems. Oil changes should occur every 15,000 km or annually to maintain engine longevity and prevent sludge or wear.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
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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
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