The Audi CTGA is a 1,968 cc, inline — four turbo — diesel engine produced between 2015 and 2020. Part of the Volkswagen Group’s EA288 diesel engine family, it features common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts. It delivers 110 kW (150 PS) with 340 Nm of torque, meeting stringent Euro 6 emissions standards through a combination of exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective cataly…
Production years 2015–2020 meet Euro 6 standards .
The Audi CTGA is a 1,968 cc inline-four turbo-diesel engine engineered for compact and mid-size models (2015–2020). It combines common rail fuel delivery with variable geometry turbocharging to deliver strong low-end torque and efficient cruising. Designed to meet Euro 6 standards, it balances performance with strict emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged with variable geometry turbo (VGT) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 110 kW (150 PS) @ 3,250–4,200 rpm | |
Torque | 340 Nm @ 1,500–3,000 rpm | |
Fuel system | Bosch CRS 2-20 common rail (up to 2,000 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Honeywell) | |
Timing system | Timing chain (interval: 200,000 km or 10 years) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 142 kg |
The Audi CTGA was used across Audi's 8V/B9/8U platforms with transverse mounting and shared within the Volkswagen Group for longitudinal applications. This engine received platform-specific adaptations-shorter intake manifolds in the A3 and revised cooling routing in the A4-and from 2018 the facelifted A4 models adopted the updated EGR valve design, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 CTGA delivers strong torque and good efficiency, but early models (2015-2017) had reliability concerns, especially intake carbon buildup. Later revisions (post-2018) improved EGR durability, so well-maintained examples can be quite robust. Regular servicing, using high-quality oil (5W-30 VW 505 01), and periodic highway runs greatly aid longevity.
The biggest issues are intake carbon buildup (leading to rough idle), turbo actuator sticking, and DPF saturation due to city driving. Other complaints include AdBlue system faults and occasional EGR valve failures. These are well-documented in Audi service bulletins.
This 2.0L diesel was used in the Audi A3 (8V), A4 (B9), and Q3 (8U) models, primarily in 2.0 TDI trim. It was also shared across the Volkswagen Group in VW Golf (2.0 TDI) from 2015-2020. In all cases, the engine met Euro 6 emissions standards.
Aftermarket ECU tuning is common on the CTGA platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Excellent for a turbo diesel. In an A4 2.0 TDI (2017), typical consumption is ~5.8 L/100km (city) and ~4.2 L/100km (highway), or about 55 mpg UK combined. Real-world figures vary, but expect 50-60 mpg (UK) on mixed roads for a healthy CTGA engine.
Yes. The EA288 series (like most modern Audis) is an interference engine. This means if the timing chain fails, pistons can strike open valves, causing catastrophic engine damage. Chain maintenance is critical—any sign of wear should be addressed immediately.
Audi specifies a 5W-30 synthetic oil meeting VW 505 01 (diesel) or 507 00 (AdBlue-equipped) specification. Change oil every 15,000 km or 2 years to ensure proper lubrication and prevent sludge buildup, especially in urban driving conditions.
Comprehensive technical documentation and regulatory references
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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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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