The Volkswagen Passat B7 1.4 TSI (150 hp) EcoFuel CNG, produced between 2010 and 2014, represents a unique offering within the broader B7 Passat range. This variant was specifically designed to cater to markets, particularly in Europe, increasingly focused on alternative fuels and reduced emissions. It combined a downsized, turbocharged gasoline engine with a dedicated Compressed Natural Gas (CNG) system, offering a bi-fuel capability. The B7 generation Passat, built on the Volkswagen Group’s B7 platform (shared with models like the Škoda Superb and Audi A4), aimed to refine the already successful B6 model with updated styling, improved technology, and enhanced efficiency. The EcoFuel CNG trim occupied a niche position, appealing to environmentally conscious buyers and those seeking to benefit from lower running costs associated with CNG fuel.
Technical Specifications
| Brand | Volkswagen |
| Model | Passat |
| Generation | Passat (B7) |
| Type (Engine) | 1.4 TSI (150 Hp) EcoFuel CNG |
| Start of production | 2010 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 9 l/100 km (26.1 US mpg, 31.4 UK mpg, 11.1 km/l) |
| Fuel consumption (economy) – urban (CNG) (NEDC) | 5.7 kg/100 km |
| Fuel consumption (economy) – extra urban (NEDC) | 5.4 l/100 km (43.6 US mpg, 52.3 UK mpg, 18.5 km/l) |
| Fuel consumption (economy) – extra urban (CNG) (NEDC) | 3.5 kg/100 km |
| Fuel consumption (economy) – combined (NEDC) | 6.8 l/100 km (34.6 US mpg, 41.5 UK mpg, 14.7 km/l) |
| Fuel consumption (economy) – combined (CNG) (NEDC) | 4.3 kg/100 km |
| CO2 emissions (NEDC) | 157 g/km |
| CO2 emissions (CNG) (NEDC) | 117 g/km |
| Fuel Type | Petrol / CNG |
| Acceleration 0 – 100 km/h | 9.8 sec |
| Acceleration 0 – 62 mph | 9.8 sec |
| Acceleration 0 – 60 mph | 9.3 sec |
| Maximum speed | 214 km/h (132.97 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 10.2 kg/Hp, 98.5 Hp/tonne |
| Weight-to-torque ratio | 6.9 kg/Nm, 144.5 Nm/tonne |
| Power | 150 Hp @ 5500 rpm |
| Power per litre | 107.9 Hp/l |
| Torque | 220 Nm @ 1500-4500 rpm (162.26 lb.-ft. @ 1500-4500 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | EA111 / CDGA |
| Engine displacement | 1390 cm3 (84.82 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 76.5 mm (3.01 in.) |
| Piston Stroke | 75.6 mm (2.98 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection and Multi-port manifold injection |
| Engine aspiration | Turbocharging and Supercharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 3.6 l (3.8 US qt | 3.17 UK qt) |
| Kerb Weight | 1523 kg (3357.64 lbs.) |
| Max. weight | 2120 kg (4673.8 lbs.) |
| Max load | 597 kg (1316.16 lbs.) |
| Trunk (boot) space – minimum | 485 l (17.13 cu. ft.) |
| Fuel tank capacity | 31 l (8.19 US gal | 6.82 UK gal) |
| CNG cylinder capacity | 21 kg |
| Max. roof load | 100 kg (220.46 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 | 90 kg (198.42 lbs.) |
| Length | 4769 mm (187.76 in.) |
| Width | 1820 mm (71.65 in.) |
| Width including mirrors | 2062 mm (81.18 in.) |
| Height | 1470 mm (57.87 in.) |
| Wheelbase | 2712 mm (106.77 in.) |
| Front track | 1552 mm (61.1 in.) |
| Rear (Back) track | 1551 mm (61.06 in.) |
| Front overhang | 941 mm (37.05 in.) |
| Rear overhang | 1116 mm (43.94 in.) |
| Ride height (ground clearance) | 135 mm (5.31 in.) |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| Approach angle | 13.5° |
| Departure angle | 11.9° |
| Ramp-over (brakeover) angle | 9.5° |
| 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, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 312×25 mm |
| Rear brakes | Disc, 286×12 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 205/55 R16; 215/55 R16; 235/45 R17; 235/40 R18 |
| Wheel rims size | 6.5J x 16; 7J x 16; 7.5J x 17; 8J x 18 |
INTRODUCTION
The Volkswagen Passat B7 1.4 TSI (150 hp) EcoFuel CNG, produced from 2010 to 2014, was a key component of Volkswagen’s strategy to offer more environmentally friendly vehicle options. Positioned as a mid-range trim within the B7 Passat lineup, it provided a balance between fuel efficiency, reasonable performance, and a lower carbon footprint. The EcoFuel designation signified Volkswagen’s commitment to natural gas vehicles, offering an alternative to traditional gasoline or diesel power. This model was primarily sold in European markets where CNG infrastructure was more developed and government incentives favored alternative fuel vehicles.
Powertrain & Engine Architecture
At the heart of the Passat B7 EcoFuel CNG lies the EA111 engine code, specifically the CDGA variant. This 1.4-liter inline-four cylinder engine utilizes both turbocharging and supercharging – a relatively complex setup designed to deliver both low-end torque and high-end power. The supercharger provides immediate boost at lower RPMs, eliminating turbo lag, while the turbocharger takes over at higher speeds for sustained power delivery. Direct fuel injection further enhances efficiency and reduces emissions. When running on CNG, the engine management system automatically switches to the appropriate fuel map. The engine produces 150 horsepower at 5500 rpm and 220 Nm (162 lb-ft) of torque between 1500 and 4500 rpm. The engine’s dual fuel capability requires a more robust fuel system, including a high-pressure CNG tank (typically 21 kg capacity) and associated regulators and injectors. The standard transmission for this variant was a 6-speed manual gearbox, although a 7-speed DSG dual-clutch transmission was sometimes offered as an option.
Driving Characteristics
The 1.4 TSI EcoFuel CNG Passat B7 offered a driving experience that prioritized fuel economy and smooth operation over outright performance. While 150 hp is adequate for everyday driving, it doesn’t provide the brisk acceleration of higher-powered Passat variants like the 2.0 TSI. The supercharger helps mitigate turbo lag, providing a responsive feel around town. On CNG, the engine’s power output is slightly reduced compared to gasoline operation, but the lower fuel cost often offset this. The 6-speed manual transmission is well-matched to the engine’s characteristics, allowing drivers to keep the engine in its optimal torque band. The gear ratios are geared towards efficiency rather than sporty acceleration. Compared to the 1.6L TDI diesel, the EcoFuel CNG offered a quieter and smoother driving experience, but lacked the diesel’s superior fuel economy and low-end torque.
Equipment & Trim Levels
The EcoFuel CNG trim level typically included a good level of standard equipment. Features commonly included air conditioning, a CD/MP3 stereo system, power windows and mirrors, and central locking. Higher trim levels added features such as alloy wheels, a multi-function steering wheel, cruise control, and upgraded upholstery. Interior trim was generally conservative, reflecting the Passat’s focus on practicality and comfort. Optional extras included a navigation system, parking sensors, and a sunroof. The presence of the CNG system necessitated specific safety features, including reinforced fuel tanks and gas leak detection systems.
Chassis & Braking
The Passat B7 EcoFuel CNG utilized a standard B7 Passat chassis setup. Front suspension consisted of independent MacPherson struts with coil springs and an anti-roll bar, while the rear featured a multi-link independent suspension system, also with a stabilizer bar. Brakes were ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) was standard. The added weight of the CNG tank, typically located under the floor in the spare wheel well, slightly altered the weight distribution compared to gasoline-only models, but the impact on handling was generally minimal. The suspension was tuned for comfort, providing a compliant ride quality.
Market Reception & Comparison
The Passat B7 1.4 TSI EcoFuel CNG was generally well-received by critics, particularly for its environmental credentials and smooth driving experience. However, its higher purchase price compared to gasoline or diesel models, and the limited availability of CNG refueling stations, hindered its widespread adoption. Compared to the 1.6 TDI, the EcoFuel CNG offered a more refined driving experience but lower fuel economy when running on gasoline. Against the 2.0 TSI, it lacked the performance but offered significantly lower running costs when utilizing CNG. The EcoFuel CNG appealed to a niche market of environmentally conscious drivers who had access to CNG infrastructure.
Legacy
The Volkswagen Passat B7 1.4 TSI EcoFuel CNG represents an important step in Volkswagen’s development of alternative fuel vehicles. While CNG never achieved mainstream popularity in many markets, the EcoFuel models demonstrated Volkswagen’s commitment to reducing emissions and exploring alternative powertrain technologies. Today, these vehicles can be found on the used car market, often at attractive prices. The EA111 engine, while known for some potential issues with carbon buildup, is generally reliable if properly maintained. The CNG system itself is relatively robust, but requires periodic inspection and maintenance to ensure safe operation. The Passat B7 EcoFuel CNG remains a viable option for buyers seeking a fuel-efficient and environmentally friendly vehicle, provided they have access to a CNG refueling network.
