The Honda S660 0.7i (64 hp) CVT, produced from April 2015 to March 2022, represents a unique offering in the modern automotive landscape – a Kei-class roadster designed primarily for the Japanese domestic market (JDM). While not officially sold in the United States, the S660 gained a cult following among enthusiasts for its lightweight construction, mid-engine layout, and engaging driving experience. This particular variant, equipped with the 0.7-liter turbocharged engine and a continuously variable transmission (CVT), served as the entry point to the S660 range, prioritizing fuel efficiency and ease of use over outright performance. It’s positioned within the broader S660 generation (internally designated as the JW5) which aimed to recapture the spirit of Honda’s classic roadsters like the S500 and S800.
Technical Specifications
| Brand | Honda |
| Model | S660 |
| Generation | S660 |
| Type (Engine) | 0.7i (64 Hp) CVT |
| Start of production | April, 2015 |
| End of production | March, 2022 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (combined) | 4.1 l/100 km (57.4 US mpg, 68.9 UK mpg, 24.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 13.3 kg/Hp, 75.3 Hp/tonne |
| Weight-to-torque ratio | 8.2 kg/Nm, 122.4 Nm/tonne |
| Power | 64 Hp @ 6000 rpm |
| Power per litre | 97.3 Hp/l |
| Torque | 104 Nm @ 2600 rpm (76.71 lb.-ft. @ 2600 rpm) |
| Engine layout | Middle, Transverse |
| Engine Model/Code | S07A |
| Engine displacement | 658 cm3 (40.15 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 64 mm (2.52 in.) |
| Piston Stroke | 68.2 mm (2.69 in.) |
| Compression ratio | 9.2:1 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 2.6 l (2.75 US qt | 2.29 UK qt) |
| Coolant | 5 l (5.28 US qt | 4.4 UK qt) |
| Kerb Weight | 850 kg (1873.93 lbs.) |
| Fuel tank capacity | 25 l (6.6 US gal | 5.5 UK gal) |
| Length | 3395 mm (133.66 in.) |
| Width | 1475 mm (58.07 in.) |
| Height | 1180 mm (46.46 in.) |
| Wheelbase | 2285 mm (89.96 in.) |
| Front track | 1300 mm (51.18 in.) |
| Rear track | 1275 mm (50.2 in.) |
| Ride height (ground clearance) | 125 mm (4.92 in.) |
| Minimum turning circle | 9.6 m (31.5 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears and type of gearbox | automatic transmission CVT |
| Front suspension | Independent type McPherson |
| Rear suspension | Torsion |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 165/55 R15 75V; 195/45 R16 80W |
| Wheel rims size | 15; 16 |
Powertrain & Engine Architecture
The heart of the S660 0.7i CVT is the S07A engine, a 658cc inline-three cylinder powerplant. This engine utilizes a single turbocharger with an intercooler to boost power output to 64 horsepower and 104 Nm (76.71 lb-ft) of torque. The engine employs multi-point fuel injection and a double overhead camshaft (DOHC) valvetrain, contributing to its relatively high power-to-liter ratio of 97.3 hp/l. The CVT, while offering smooth acceleration and improved fuel economy, differs significantly from a traditional automatic transmission. It uses a belt-and-pulley system to provide a virtually infinite number of gear ratios, optimizing engine speed for efficiency or power. The engine is transversely mounted in a mid-engine configuration, contributing to the car’s balanced handling characteristics.
Driving Characteristics
The S660 0.7i CVT delivers a unique driving experience. While the 64 hp output isn’t substantial, the car’s incredibly light weight (850 kg / 1873.93 lbs) allows for brisk acceleration. The CVT, however, alters the driving feel compared to the six-speed manual transmission available on other S660 models. The CVT prioritizes smooth, linear acceleration, lacking the distinct gear changes of a manual. This can feel less engaging for driving enthusiasts, but it makes the S660 exceptionally easy to drive in urban environments. The CVT’s ratios are tuned for fuel efficiency, and while it can hold lower gears for longer during acceleration, it doesn’t offer the same level of control as a manual gearbox. Compared to the higher-output S660 models, this variant feels less potent, but its lighter weight and efficient transmission make it surprisingly nimble.
Equipment & Trim Levels
The S660 0.7i CVT typically came with a relatively basic level of equipment, reflecting its position as the entry-level model. Standard features generally included air conditioning, power windows, power steering, and ABS brakes. Interior upholstery was typically cloth, and the dashboard featured a simple, functional design. Optional extras included alloy wheels, a touchscreen infotainment system, and various cosmetic enhancements. Higher trim levels, such as the S660 Alpha and Beta, offered more luxurious features like leather upholstery, upgraded audio systems, and additional aerodynamic components.
Chassis & Braking
The S660 utilizes a lightweight chassis with independent McPherson strut suspension in the front and a torsion beam setup in the rear. This suspension configuration provides a good balance between ride comfort and handling precision. Disc brakes are fitted on all four wheels, providing adequate stopping power for the car’s weight and performance. The electric power steering offers light and precise control, enhancing the driving experience. The relatively short wheelbase (2285 mm / 89.96 in.) contributes to the car’s agile handling characteristics.
Market Reception & Comparison
The Honda S660 0.7i CVT was generally well-received by critics, particularly for its engaging driving dynamics and fuel efficiency. However, some reviewers noted that the CVT transmission detracted from the overall driving experience compared to the manual gearbox. Fuel economy was a strong point, with the S660 achieving approximately 4.1 l/100 km (57.4 US mpg). Compared to other S660 trims, the 0.7i CVT offered a more affordable entry point, but at the expense of outright performance. It appealed to buyers who prioritized fuel efficiency and ease of use over sporty driving dynamics.
Legacy
The Honda S660, while not a mainstream success, has become a sought-after vehicle among enthusiasts, particularly in the used car market. The 0.7i CVT variant, while not the most desirable trim for performance-oriented drivers, offers a unique and affordable way to experience the S660’s lightweight and engaging chassis. The S07A engine, while small, has proven to be relatively reliable, and the CVT transmission, when properly maintained, can provide years of trouble-free service. The S660 represents a rare example of a modern, mid-engine roadster, and its legacy as a fun-to-drive and fuel-efficient sports car is likely to endure.
