Mitsubishi Toppo 659 R-4WD (55 Hp) Automatic

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

BrandMitsubishi
ModelToppo
GenerationToppo
Type (Engine)659 R-4WD (55 Hp) Automatic
Start of production1990
End of production1999
Powertrain ArchitectureInternal Combustion engine
Body typeHatchback
Seats5
Doors3
Fuel consumption (combined)4.9 l/100 km (48 US mpg, 57.6 UK mpg, 20.4 km/l)
Fuel TypePetrol (Gasoline)
Weight-to-power ratio14.4 kg/Hp, 69.6 Hp/tonne
Weight-to-torque ratio13.2 kg/Nm, 75.9 Nm/tonne
Power55 Hp @ 7000 rpm
Power per litre83.5 Hp/l
Torque60 Nm @ 5000 rpm (44.25 lb.-ft. @ 5000 rpm)
Engine layoutFront, Transverse
Engine displacement659 cm3 (40.21 cu. in.)
Number of cylinders4
Engine configurationInline
Cylinder Bore60 mm (2.36 in.)
Piston Stroke58.3 mm (2.3 in.)
Compression ratio8.5:1
Number of valves per cylinder4
Fuel injection systemMulti-port manifold injection
Engine aspirationNaturally aspirated engine
ValvetrainOHC
Kerb Weight790 kg (1741.65 lbs.)
Fuel tank capacity32 l (8.45 US gal | 7.04 UK gal)
Length3255 mm (128.15 in.)
Width1395 mm (54.92 in.)
Height1795 mm (70.67 in.)
Wheelbase2265 mm (89.17 in.)
Front track1215 mm (47.83 in.)
Rear track1215 mm (47.83 in.)
Drive wheelAll wheel drive (4×4)
Number of gears and type of gearbox4 gears, automatic transmission
Front suspensionSpring Strut
Rear suspensionCoil spring
Front brakesDisc
Rear brakesDrum
Assisting systemsABS (Anti-lock braking system)
Steering typeSteering rack and pinion
Tires size155/70 R13 S
Wheel rims size13

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.

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