Rose Sword

Rose Sword is a compact rear-engine economy car concept built around one main idea: it should keep running no matter what. Inspired by the Fiat 126 and other small 1980s hatchbacks, the design combines simple retro styling with rugged mechanical systems, off-road capability, and extreme serviceability.

Instead of focusing on comfort or luxury, Rose Sword focuses on durability. Every major feature, from the air-cooled diesel engine to the removable service panels and labeled gauges, was designed to make the car easier to maintain, repair, and trust over a long lifespan.

My Thinking

To create Rose Sword, I focused on designing a car that was simple, durable, and easy to repair. The body was inspired by the Fiat 126 and other small 1980s economy cars, but the mechanical layout is original and built around long-term reliability.

I chose a rear-engine layout with an air-cooled opposed two-cylinder diesel engine because it keeps the drivetrain compact and leaves room for cargo above the engine. The engine uses mechanical injection, glow plugs, oil cooling, and large fans to reduce complexity while still working in difficult conditions.

Many details were designed around serviceability. The car includes protected wiring, accessible filters, removable panels, a drop-out rear engine assembly, and data plates with service information. The goal was to make a small car that could handle rough roads, poor fuel, heat, dust, and years of use while still being easy to understand and maintain.

FEATURES

Engine Bay:
The rear engine bay contains a custom air-cooled opposed two-cylinder diesel engine. It uses mechanical injection, glow plugs, pushrods, oil coolers, and two large fans to keep the engine simple, durable, and easy to maintain.

Cooling System:
Large side vents feed air into the rear cooling fans. The fan intake fins can be manually opened or closed, allowing the driver to control airflow for hot weather, cold starts, or dusty conditions.

Front Storage and Service Area:
The front trunk provides storage while also protecting important service components. Under the removable storage area are the steering rack, master cylinders, washer fluid, throttle cable routing, and other front-end systems.

Interior:
The interior is simple and mechanical. It includes a tall floor-mounted shifter, crank windows, mechanical seat adjustments, a handbrake, a large glove box, and a removable center tunnel that protects wiring and shift cables.

Gauges:
The dashboard uses clearly labeled gauges with different fonts and visual styles so each one can be recognized quickly. The gauges include voltage, fuel level, oil pressure, oil temperature, RPM, speed, cylinder head temperatures, trip distance, and a seven-digit odometer.

Service Plates:
Data plates are mounted directly onto important components. These plates list torque specs, oil type, oil capacity, filter information, part numbers, and basic service procedures so the car can still be repaired correctly decades later.

Exterior:
The exterior combines small 1980s economy car proportions with rugged off-road details. The wide fenders, high-clearance stance, rear vents, exposed fuel cap, retro lights, and compact body give the car a practical but distinctive look.

Storage:
Rose Sword includes multiple storage areas despite its small size. The car has a front trunk, rear cargo space above the engine, and storage compartments built into the rear fender flares.

SPECIFICATONS

Overall Design:
Compact 1980s-inspired economy car with rugged, practical styling and a focus on extreme reliability.

Layout:
Rear-engine, two-seat compact car with a custom air-cooled 2.0L opposed two-cylinder diesel engine and a six-speed manual transmission.

Engine:
Mechanical diesel injection, glow plugs, pushrod valvetrain, large oil pan, oil cooling fins, dual oil coolers, and two large cooling fans.

Cooling:
Air-cooled and oil-cooled system with manually adjustable fan intake vents for heat, dust, and cold-start conditions.

Suspension:
Four-wheel independent double-wishbone suspension with rack-and-pinion steering and Ackermann steering geometry.

Brakes:
Single-piston brakes on all four wheels, with larger brakes in the front.

Drivetrain:
Six-speed manual transmission with a very low first gear for crawling and rough terrain.

Performance:
50 horsepower, 70 foot-pounds of torque, and a 4,000 RPM maximum engine speed. The engine is intentionally under-stressed for long-term durability.

Efficiency:
Estimated 50 miles per gallon with a 25-gallon diesel fuel tank, giving the car a possible range of up to 900 miles.

Weight:
Approximately 2,100 pounds empty.

Serviceability:
Engine drop-out design, protected internal cable routing, accessible filters, removable center tunnel, service data plates, and simplified mechanical controls.

Interior:
Simple two-seat cabin with mechanical controls, clearly labeled gauges, crank windows, a sunroof, and minimal electronics.

Target Use:
Designed for rural areas, rough roads, hot climates, dusty environments, and drivers who need a simple car that can keep running with minimal maintenance.