The Smart Fortwo II Cabrio (A451) 17.6 kWh electric drive, produced between 2012 and 2015, represents a unique chapter in the evolution of urban microcars. This all-electric variant of the second-generation Fortwo Cabrio was primarily aimed at the European market, particularly in cities with growing environmental concerns and incentives for electric vehicle adoption. While not officially sold in the United States during its production run, it exemplifies Smart’s commitment to innovative, compact, and eco-friendly transportation solutions. The A451 generation, in general, built upon the success of the original Fortwo, offering improved safety, refinement, and a wider range of customization options. The electric version specifically targeted environmentally conscious consumers seeking a practical and stylish city car.
Smart Fortwo II Cabrio (A451) Electric Drive: An Overview
The Smart Fortwo II Cabrio (A451) electric drive is a two-seater, rear-wheel-drive city car powered by a 17.6 kWh lithium-ion battery pack. It distinguishes itself from its gasoline-powered counterparts through its zero-emission operation and quiet driving experience. The Cabrio body style, with its retractable soft top, adds an element of open-air enjoyment, making it particularly appealing for urban environments and leisure driving. The vehicle’s compact dimensions and nimble handling make it exceptionally well-suited for navigating congested city streets and tight parking spaces. Its introduction coincided with a growing awareness of sustainable transportation and the increasing availability of charging infrastructure in major European cities.
Engine & Performance
The heart of the Smart Fortwo II Cabrio electric drive is its 75 horsepower (Hp) electric motor, delivering 130 Nm (95.88 lb.-ft.) of torque. This powertrain provides surprisingly adequate performance for urban driving, with a 0-60 mph (0-97 km/h) acceleration time of approximately 10.9 seconds and a top speed of 77.67 mph (125 km/h). The single-speed automatic transmission ensures smooth and effortless acceleration. The battery, located under the floor, provides a usable capacity of 16.7 kWh, translating to an all-electric range of approximately 90.1 miles (145 km). Energy consumption is rated at 15.1 kWh per 100 kilometers (24.3 kWh per 100 miles), equating to 139 MPGe and 6.6 km/kWh (4.1 mi/kWh). The rear-wheel-drive configuration contributes to the car’s playful handling characteristics.
Design & Features
The Smart Fortwo II Cabrio maintains the distinctive and playful design language of the Fortwo lineage. Its compact dimensions – measuring 2695 mm (106.1 in.) in length and 1559 mm (61.38 in.) in width – are central to its appeal. The Cabrio body style features a retractable soft top, allowing for open-air driving. Inside, the cabin is designed to maximize space efficiency, offering comfortable seating for two adults. Safety features, while limited by the vehicle’s size, include ABS (Anti-lock Braking System). The interior trim and available options allowed for a degree of personalization, reflecting Smart’s emphasis on individual expression. The trunk space, while modest, ranges from 220 liters (7.77 cu. ft.) to 340 liters (12.01 cu. ft.) depending on the soft top’s position. The car’s overall aesthetic is modern and approachable, appealing to a younger, urban demographic.
Technological Innovations
The A451 electric drive incorporated several technological advancements for its time. The lithium-ion battery technology provided a significant improvement in energy density and range compared to earlier electric vehicle batteries. The electric motor’s placement at the rear axle optimized weight distribution and contributed to the car’s nimble handling. The regenerative braking system helped to recapture energy during deceleration, extending the vehicle’s range. The car’s electronic control unit (ECU) managed the powertrain efficiently, optimizing performance and energy consumption. While lacking the advanced connectivity features of modern electric vehicles, the A451 electric drive represented a significant step forward in electric vehicle technology for the early 2010s.
Technical Specifications
| Brand | Smart |
| Model | Fortwo |
| Generation | Fortwo II cabrio (A451) |
| Type (Engine) | 17.6 kWh (75 Hp) electric drive |
| Start of production | 2012 |
| End of production | 2015 |
| Powertrain Architecture | BEV (Electric Vehicle) |
| Body type | Cabriolet |
| Seats | 2 |
| Doors | 2 |
| Fuel Type | Electricity |
| Acceleration 0 – 100 km/h | 11.5 sec |
| Acceleration 0 – 62 mph | 11.5 sec |
| Acceleration 0 – 60 mph | 10.9 sec |
| Maximum speed | 125 km/h (77.67 mph) |
| Weight-to-power ratio | 12.3 kg/Hp, 81.5 Hp/tonne |
| Weight-to-torque ratio | 7.1 kg/Nm, 141.3 Nm/tonne |
| Gross battery capacity | 17.6 kWh |
| Net (usable) battery capacity | 16.7 kWh |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Below the floor |
| All-electric range | 145 km (90.1 mi) |
| Average Energy consumption | 15.1 kWh/100 km (24.3 kWh/100 mi) |
| Electric motor | 1 |
| Electric motor power | 75 Hp |
| Electric motor Torque | 130 Nm (95.88 lb.-ft.) |
| Electric motor model/code | EM0003 |
| Electric motor location | Rear axle, Transverse |
| System power | 75 Hp |
| System torque | 130 Nm (95.88 lb.-ft.) |
| Kerb Weight | 920 kg (2028.25 lbs.) |
| Max. weight | 1150 kg (2535.32 lbs.) |
| Max load | 230 kg (507.06 lbs.) |
| Trunk (boot) space – minimum | 220 l (7.77 cu. ft.) |
| Trunk (boot) space – maximum | 340 l (12.01 cu. ft.) |
| Length | 2695 mm (106.1 in.) |
| Width | 1559 mm (61.38 in.) |
| Height | 1565 mm (61.61 in.) |
| Wheelbase | 1867 mm (73.5 in.) |
| Front track | 1283 mm (50.51 in.) |
| Rear (Back) track | 1385 mm (54.53 in.) |
| Minimum turning circle | 8.75 m (28.71 ft.) |
| Drivetrain Architecture | One electric motor drives the rear wheels. |
| Drive wheel | Rear wheel drive |
| Number of gears | 1 gears, automatic transmission |
| Front suspension | Independent type McPherson |
| Rear suspension | Suspension De-Dion |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | Front wheel tires: 155/60 R15Rear wheel tires: 175/55 R15 |
| Wheel rims size | Front wheel rims: 4.5J x 15Rear wheel rims: 5J x 15 |



