The Smart Fortwo II coupe (C451) 0.8 cdi, produced from 2007 to 2009, represents a significant iteration in the evolution of the Smart car, a city vehicle renowned for its diminutive size and fuel efficiency. This generation, the second Fortwo coupe, continued the brand’s commitment to micro-urban mobility, primarily targeting European markets where congested city centers and limited parking spaces are commonplace. While not officially sold in the United States during these specific years, the Smart Fortwo gained a limited US presence later, and the C451’s engineering and design principles are representative of the broader Smart philosophy. The 0.8 cdi variant, equipped with a small-displacement diesel engine and automatic transmission, was designed to maximize fuel economy and minimize environmental impact, appealing to environmentally conscious urban drivers.
Smart Fortwo II Coupe (C451): A Detailed Overview
The C451 Fortwo built upon the foundation laid by its predecessor, offering improved safety features, enhanced build quality, and a more refined driving experience. Its compact dimensions – measuring under nine feet in length – allowed for unparalleled maneuverability and parking ease in crowded urban environments. The 0.8 cdi model, in particular, distinguished itself with its frugal fuel consumption and surprisingly capable diesel powerplant for its size. The vehicle’s rear-wheel-drive layout, while unconventional for a car of this size, contributed to its nimble handling characteristics. The C451 was a key model in establishing Smart as a recognizable and innovative brand within the European microcar segment.
Engine & Performance
The heart of the Smart Fortwo II coupe 0.8 cdi is a 799cc inline three-cylinder diesel engine, designated OM 660.950. Despite its small displacement, this engine produces 45 horsepower, a respectable figure considering the vehicle’s light weight. A turbocharger with an intercooler is employed to boost power and torque, enhancing drivability. The engine’s high compression ratio of 18.5:1 contributes to its efficiency, while a diesel commonrail fuel injection system ensures precise fuel delivery. Power is delivered to the rear wheels via a five-speed automatic transmission. The engine’s output translates to a maximum speed of 83.89 mph (135 km/h). The weight-to-power ratio of 17.3 kg/Hp allows for surprisingly brisk acceleration within the urban environment. Fuel economy is a standout feature, with combined cycle consumption rated at 71.3 US mpg (3.3 l/100 km), making it one of the most fuel-efficient vehicles of its time.
Design & Features
The Smart Fortwo II coupe (C451) boasts a distinctive two-door coupe body style, characterized by its short wheelbase and overall compact footprint. The design prioritizes functionality and urban practicality. The vehicle seats two occupants comfortably, offering a surprisingly spacious interior given its exterior dimensions. Safety features, while limited by the vehicle’s size, were improved in the C451 generation, including the inclusion of ABS (Anti-lock Braking System) as standard equipment. The trunk (boot) space, ranging from 7.77 to 12.01 cubic feet (220 to 340 liters), is adequate for daily errands and shopping. The C451’s exterior styling is modern and minimalist, reflecting the Smart brand’s design language. The vehicle’s structural design incorporates a high-strength safety cell, providing occupants with a degree of protection in the event of a collision. The rear engine placement contributes to the car’s unique handling characteristics and allows for a relatively flat cargo floor.
Technical Specifications
| Brand | Smart |
| Model | Fortwo |
| Generation | Fortwo II coupe (C451) |
| Type (Engine) | 0.8 cdi (45 Hp) Automatic |
| Start of production | 2007 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 3.4 l/100 km (69.2 US mpg, 83.1 UK mpg, 29.4 km/l) |
| Fuel consumption (extra urban) | 3.2 l/100 km (73.5 US mpg, 88.3 UK mpg, 31.3 km/l) |
| Fuel consumption (combined) | 3.3 l/100 km (71.3 US mpg, 85.6 UK mpg, 30.3 km/l) |
| Fuel Type | Diesel |
| Maximum speed | 135 km/h (83.89 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 17.3 kg/Hp, 57.7 Hp/tonne |
| Power | 45 Hp |
| Power per litre | 56.3 Hp/l |
| Engine layout | Rear, Transverse |
| Engine Model/Code | OM 660.950 |
| Engine displacement | 799 cm3 (48.76 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 65.5 mm (2.58 in.) |
| Piston Stroke | 79 mm (3.11 in.) |
| Compression ratio | 18.5:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | OHC |
| Engine oil capacity | 2.7 l (2.85 US qt | 2.38 UK qt) |
| Kerb Weight | 780 kg (1719.61 lbs.) |
| Max. weight | 1050 kg (2314.85 lbs.) |
| Max load | 270 kg (595.25 lbs.) |
| Trunk (boot) space – minimum | 220 l (7.77 cu. ft.) |
| Trunk (boot) space – maximum | 340 l (12.01 cu. ft.) |
| Fuel tank capacity | 33 l (8.72 US gal | 7.26 UK gal) |
| Length | 2695 mm (106.1 in.) |
| Width | 1559 mm (61.38 in.) |
| Height | 1542 mm (60.71 in.) |
| Wheelbase | 1867 mm (73.5 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 155/60 R15; 175/55 R15 |
| Wheel rims size | 15 |
In conclusion, the Smart Fortwo II coupe (C451) 0.8 cdi represents a compelling example of efficient and innovative urban transportation. Its compact size, fuel-efficient diesel engine, and practical features made it a popular choice for city dwellers in Europe, and its legacy continues to influence the development of microcars and alternative mobility solutions today.
