The Mitsubishi Toppo, particularly the 659 R-4WD variant produced between 1990 and 1999, represents a unique offering within the Japanese Kei car class, though it wasn’t directly marketed as a Kei car due to its dimensions exceeding those limitations. This small, three-door hatchback was primarily designed for the Japanese domestic market (JDM), catering to the need for affordable and practical transportation in densely populated urban areas. While not officially sold in the United States, understanding the Toppo provides insight into the innovative engineering and efficient design philosophies prevalent in Japanese automotive manufacturing during the late 20th century. The 659 R-4WD model, with its modest 55 horsepower, focused on fuel economy and maneuverability, making it a popular choice for city commuting.
Mitsubishi Toppo 659 R-4WD: A Detailed Overview
The Toppo occupied a niche between the ultra-compact Kei cars and larger, more conventional hatchbacks. It offered a balance of interior space, practicality, and affordability, appealing to first-time car buyers, small families, and individuals seeking a nimble vehicle for navigating tight city streets. The “659” designation refers to the engine displacement, a key characteristic of the model. The R-4WD variant specifically denotes the all-wheel-drive system, enhancing traction and stability, particularly useful in Japan’s varied weather conditions. The Toppo’s design prioritized functionality over outright performance, making it a sensible and economical choice for its target demographic.
Engine & Performance
Powering the Mitsubishi Toppo 659 R-4WD is a 659cc inline four-cylinder gasoline engine. This naturally aspirated engine produces 55 horsepower at 7000 rpm and 60 Nm (44.25 lb.-ft.) of torque at 5000 rpm. While these figures may seem modest by modern standards, they were adequate for the vehicle’s lightweight construction and intended purpose. The engine features a multi-port fuel injection system and an overhead camshaft (OHC) valvetrain, contributing to relatively efficient combustion. The power-to-weight ratio of 14.4 kg/Hp (69.6 Hp/tonne) and torque-to-weight ratio of 13.2 kg/Nm (75.9 Nm/tonne) highlight the Toppo’s nimble character. The engine is paired with a four-speed automatic transmission, providing ease of use and convenience for urban driving. Fuel economy is a strong point, achieving 4.9 l/100 km (48 US mpg, 57.6 UK mpg, or 20.4 km/l), reflecting the focus on efficiency.
Design & Features
The Mitsubishi Toppo 659 R-4WD is a three-door hatchback with a compact footprint. Its design is characterized by clean lines and a practical, no-frills aesthetic. The vehicle comfortably seats five passengers, although rear passenger space is limited. The interior is functional and designed for durability, with a focus on ease of maintenance. Key features included an anti-lock braking system (ABS) for enhanced safety, a steering rack and pinion system for precise handling, and a relatively spacious cargo area for its size. The all-wheel-drive system, a defining feature of the R-4WD model, provides improved traction and stability on slippery surfaces. The Toppo’s small size and tight turning radius made it exceptionally maneuverable in congested urban environments. The vehicle’s 13-inch wheels are fitted with 155/70 R13 S tires, contributing to a comfortable ride and adequate grip.
Technical Specifications
| Brand | Mitsubishi |
| Model | Toppo |
| Generation | Toppo |
| Type (Engine) | 659 R-4WD (55 Hp) Automatic |
| Start of production | 1990 |
| End of production | 1999 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 3 |
| Fuel consumption (combined) | 4.9 l/100 km (48 US mpg, 57.6 UK mpg, 20.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 14.4 kg/Hp, 69.6 Hp/tonne |
| Weight-to-torque ratio | 13.2 kg/Nm, 75.9 Nm/tonne |
| Power | 55 Hp @ 7000 rpm |
| Power per litre | 83.5 Hp/l |
| Torque | 60 Nm @ 5000 rpm (44.25 lb.-ft. @ 5000 rpm) |
| Engine layout | Front, Transverse |
| Engine displacement | 659 cm3 (40.21 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 60 mm (2.36 in.) |
| Piston Stroke | 58.3 mm (2.3 in.) |
| Compression ratio | 8.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHC |
| Kerb Weight | 790 kg (1741.65 lbs.) |
| Fuel tank capacity | 32 l (8.45 US gal | 7.04 UK gal) |
| Length | 3255 mm (128.15 in.) |
| Width | 1395 mm (54.92 in.) |
| Height | 1795 mm (70.67 in.) |
| Wheelbase | 2265 mm (89.17 in.) |
| Front track | 1215 mm (47.83 in.) |
| Rear track | 1215 mm (47.83 in.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Disc |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 155/70 R13 S |
| Wheel rims size | 13 |
The Mitsubishi Toppo 659 R-4WD, while not a household name in the United States, represents a significant example of Japanese automotive engineering focused on practicality, efficiency, and adaptability to urban environments. Its enduring popularity in Japan speaks to its successful fulfillment of a specific market need, and its technical specifications demonstrate a thoughtful approach to maximizing performance within a compact and economical package.


