The SMA C81 represents a compact sedan produced from 2006 to 2016. While not a widely recognized brand in the United States, SMA (Société des Manufactures Automobiles) was a European automotive manufacturer primarily focused on providing affordable and practical transportation in select markets. The C81, specifically the 1.8-liter variant producing 115 horsepower, served as a mainstay in their lineup, competing with other subcompact and compact sedans popular in Europe during that period. This article details the technical specifications, design, and performance characteristics of the SMA C81 1.8.
SMA C81 1.8: Overview and Market Positioning
The C81 was designed to appeal to a broad customer base seeking a reliable and economical vehicle. Its positioning within the European market was as a no-frills, value-oriented sedan, offering a practical alternative to more expensive and feature-rich competitors. The 1.8-liter engine was the higher-performance option in the C81 range, providing a balance between fuel efficiency and adequate power for everyday driving. The vehicle’s design prioritized functionality and affordability over luxury or cutting-edge styling. It was intended to be a workhorse vehicle, suitable for both urban commuting and longer journeys.
Engine & Performance
The heart of the SMA C81 1.8 is a 1.8-liter (1762 cm3 or 107.52 cu. in.) inline four-cylinder gasoline engine. This naturally aspirated engine produces 115 horsepower at 5600 rpm and 157 Nm (115.8 lb.-ft.) of torque at 3400 rpm. The engine utilizes a multi-port fuel injection system and a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. This configuration contributes to a respectable power output of 65.3 horsepower per liter. Power is delivered to the front wheels via a five-speed manual transmission. The C81 1.8 achieves a maximum speed of 175 km/h (108.74 mph). The weight-to-power ratio is 9.8 kg/Hp, and the weight-to-torque ratio is 7.2 kg/Nm, indicating a reasonably efficient powertrain for its class. The engine meets Euro 3 emission standards, reflecting the environmental regulations in place during its production run.
Design & Features
The SMA C81 is a traditional four-door sedan with a five-seat configuration. Its design is characterized by simple, functional lines, prioritizing practicality over aesthetic flair. The vehicle’s dimensions are 4435 mm (174.61 in.) in length, 1710 mm (67.32 in.) in width, and 1430 mm (56.3 in.) in height, with a wheelbase of 2540 mm (100 in.). The C81 offers 520 liters (18.36 cu. ft.) of trunk space, providing ample room for luggage and cargo.
Safety features, while not as comprehensive as those found in modern vehicles, included an Anti-lock Braking System (ABS) as standard equipment. The braking system consists of ventilated discs on the front wheels and drum brakes on the rear. Steering is rack and pinion with hydraulic power assistance. The C81 rides on 175/65 R14 tires. The interior of the C81 is designed for durability and ease of use, with a focus on providing a comfortable and functional space for passengers. The vehicle’s overall design reflects its intended purpose as an affordable and reliable mode of transportation.
Technical Specifications
| Brand | SMA |
| Model | C81 |
| Generation | C81 |
| Type (Engine) | 1.8 (115 Hp) |
| Start of production | 2006 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (extra urban) | 7 l/100 km (33.6 US mpg, 40.4 UK mpg, 14.3 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Maximum speed | 175 km/h (108.74 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 9.8 kg/Hp |
| Weight-to-torque ratio | 7.2 kg/Nm |
| Power | 115 Hp @ 5600 rpm |
| Power per litre | 65.3 Hp/l |
| Torque | 157 Nm @ 3400 rpm (115.8 lb.-ft. @ 3400 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | JL481Q |
| Engine displacement | 1762 cm3 (107.52 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 81 mm (3.19 in.) |
| Piston Stroke | 85.5 mm (3.37 in.) |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Kerb Weight | 1130 kg (2491.22 lbs.) |
| Max. weight | 1510 kg (3328.98 lbs.) |
| Max load | 380 kg (837.76 lbs.) |
| Trunk (boot) space – maximum | 520 l (18.36 cu. ft.) |
| Fuel tank capacity | 51 l (13.47 US gal | 11.22 UK gal) |
| Length | 4435 mm (174.61 in.) |
| Width | 1710 mm (67.32 in.) |
| Height | 1430 mm (56.3 in.) |
| Wheelbase | 2540 mm (100 in.) |
| Front track | 1423 mm (56.02 in.) |
| Rear (Back) track | 1424 mm (56.06 in.) |
| Minimum turning circle | 10.5 m (34.45 ft.) |
| Drivetrain Architecture | Front wheel drive, Internal Combustion engine |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Semi-independent, longitudinal arms with transverse torsion shafts |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 175/65 R14 |
The SMA C81 1.8, while not a performance vehicle, offered a practical and affordable transportation solution for European consumers. Its simple design, reliable powertrain, and reasonable fuel economy made it a popular choice for those seeking a no-nonsense sedan.
