The Audi A5 Sportback (F5) g-tron 2.0 TFSI, produced from 2017 to 2018, represents a unique offering within the fifth-generation A5 (F5) family. This variant distinguished itself by its bi-fuel capability, designed to run on either gasoline or Compressed Natural Gas (CNG), catering to markets with established CNG infrastructure and incentives. Positioned as a more environmentally conscious alternative within the A5 Sportback lineup, it occupied a niche between the standard petrol models and the more performance-oriented S5 variants. The g-tron model was primarily aimed at European markets where CNG was a viable fuel source, offering reduced running costs and lower emissions.
Technical Specifications
| Brand | Audi |
| Model | A5 |
| Generation | A5 Sportback (F5) |
| Type (Engine) | g-tron 2.0 TFSI (170 Hp) |
| Start of production | 2017 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Fastback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 7.8-8.1 l/100 km (30.2 – 29 US mpg, 36.2 – 34.9 UK mpg, 12.8 – 12.3 km/l) |
| Fuel consumption (economy) – urban (CNG) | 5.4-5.5 kg/100 km |
| Fuel consumption (economy) – extra urban | 4.8-5.2 l/100 km (49 – 45.2 US mpg, 58.9 – 54.3 UK mpg, 20.8 – 19.2 km/l) |
| Fuel consumption (economy) – extra urban (CNG) | 3.1-3.4 kg/100 km |
| Fuel consumption (economy) – combined | 5.9-6.3 l/100 km (39.9 – 37.3 US mpg, 47.9 – 44.8 UK mpg, 16.9 – 15.9 km/l) |
| Fuel consumption (economy) – combined (CNG) | 4-4.2 kg/100 km |
| CO2 emissions | 135-143 g/km |
| CO2 emissions (CNG) | 108-114 g/km |
| Fuel Type | Petrol / CNG |
| Acceleration 0 – 100 km/h | 8.5 sec |
| Acceleration 0 – 62 mph | 8.5 sec |
| Acceleration 0 – 60 mph | 8.1 sec |
| Maximum speed | 226 km/h (140.43 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 9.1 kg/Hp, 110.4 Hp/tonne |
| Weight-to-torque ratio | 5.7 kg/Nm, 175.3 Nm/tonne |
| Power | 170 Hp @ 4450-6000 rpm |
| Power per litre | 85.7 Hp/l |
| Torque | 270 Nm @ 1650-4400 rpm (199.14 lb.-ft. @ 1650-4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA888 / CVLA |
| Engine displacement | 1984 cm3 (121.07 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82.5 mm (3.25 in.) |
| Piston Stroke | 92.8 mm (3.65 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection and Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Kerb Weight | 1540 kg (3395.12 lbs.) |
| Max. weight | 2090 kg (4607.66 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 390 l (13.77 cu. ft.) |
| Fuel tank capacity | 25 l (6.6 US gal | 5.5 UK gal) |
| CNG cylinder capacity | 19 kg |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load with brakes (8%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4733 mm (186.34 in.) |
| Width | 1843 mm (72.56 in.) |
| Width including mirrors | 2029 mm (79.88 in.) |
| Height | 1392 mm (54.8 in.) |
| Wheelbase | 2823 mm (111.14 in.) |
| Front track | 1587 mm (62.48 in.) |
| Rear (Back) track | 1568 mm (61.73 in.) |
| Front overhang | 878 mm (34.57 in.) |
| Rear overhang | 1032 mm (40.63 in.) |
| Minimum turning circle (turning diameter) | 11.7 m (38.39 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent multi-link suspension, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
Powertrain & Engine Architecture
The heart of the A5 Sportback g-tron is the EA888 2.0-liter turbocharged four-cylinder engine, specifically the CVLA code variant. This engine is part of the Volkswagen Group’s modular engine family and features direct fuel injection combined with multi-point injection. This dual-injection system optimizes combustion for both gasoline and CNG operation. The engine utilizes a single turbocharger with an intercooler to boost power and efficiency. The valvetrain employs a Dual Overhead Camshaft (DOHC) configuration with four valves per cylinder, enhancing breathing and overall performance. The g-tron system allows the vehicle to seamlessly switch between gasoline and CNG, prioritizing CNG when available. When CNG reserves are depleted, the engine automatically switches back to gasoline. The 6-speed manual transmission was standard, providing a direct connection to the engine and contributing to a more engaging driving experience.
Driving Characteristics
The 170 hp and 270 Nm (199 lb-ft) of torque delivered by the g-tron powertrain provided adequate performance for everyday driving. Acceleration from 0-60 mph took approximately 8.1 seconds, and top speed was limited to 140.43 mph. Compared to the higher-output 2.0 TFSI variants (like the 252 hp version), the g-tron felt less eager to accelerate, particularly in higher gears. However, the readily available torque from 1650 rpm ensured decent responsiveness in urban and highway scenarios. The manual transmission offered precise shifts, but the gear ratios were tuned for fuel efficiency rather than outright performance. When running on CNG, a slight reduction in power was noticeable, but the lower fuel costs often offset this. The handling was typical of the A5 Sportback – composed and predictable, with a focus on comfort rather than sporty dynamics.
Equipment & Trim Levels
The A5 Sportback g-tron typically came with a well-equipped standard specification, reflecting its position as a premium vehicle. Standard features included Audi’s MMI infotainment system with a central display screen, automatic climate control, power windows and mirrors, and alloy wheels. Interior upholstery was generally cloth or a combination of cloth and leatherette. Optional extras included leather seats, a sunroof, a premium sound system, and advanced driver-assistance systems like adaptive cruise control and lane departure warning. The g-tron trim often featured unique badging and interior accents to distinguish it from other A5 Sportback models.
Chassis & Braking
The A5 Sportback g-tron utilized a front-wheel-drive layout with an independent multi-link suspension at both the front and rear. This suspension setup provided a comfortable ride quality and good handling characteristics. The front suspension incorporated a transverse stabilizer bar to reduce body roll during cornering. Braking duties were handled by ventilated discs at the front and solid discs at the rear, equipped with ABS (Anti-lock Braking System) for enhanced safety. The steering system was an electric power steering setup, offering precise and responsive control.
Market Reception & Comparison
The Audi A5 Sportback g-tron was generally well-received by automotive critics, particularly for its innovative bi-fuel technology and reduced emissions. However, its higher purchase price compared to standard petrol models and the limited availability of CNG refueling stations were noted as potential drawbacks. Compared to the 1.8 TFSI and 2.0 TFSI variants, the g-tron offered similar performance but with the added benefit of lower running costs when utilizing CNG. The 1.8 TFSI was often seen as the entry-level option, while the 2.0 TFSI catered to drivers seeking more power. The g-tron appealed to environmentally conscious buyers who had access to a reliable CNG infrastructure.
Legacy
The A5 Sportback g-tron represents an early attempt by Audi to offer a more sustainable alternative within its model range. While production was relatively short-lived, the g-tron powertrain proved to be reliable, with few reported issues. On the used car market, these models are sought after by enthusiasts and those looking for a unique and environmentally friendly vehicle. The long-term reliability of the EA888 engine is well-established, and the g-tron system itself has proven to be durable. However, the availability of CNG refueling stations remains a key consideration for potential buyers.
