1978 Mazda RX-4 Sedan Auto
Photo: 1973 Mazda RX-4 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
Photo: 1973 Mazda RX-4 1 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
Photo: Mazda RX-4 first registered August 1973 by Charles01, CC BY-SA 3.0, via Wikimedia Commons
Photo: Mazda RX-4 Hardtop by JAK SIE MASZ from Adelaide (South Australia), Australia, cropped and altered by uploader Mr.choppers, CC BY-SA 2.0, via Wikimedia Commons
Photo: Techno-Classica 2025, Essen (P1046118) by Matti Blume, CC BY-SA 4.0, via Wikimedia Commons
Photos show the RX-4 (LA2) (1972–1978); trim, color, and model year may differ.
All photo credits
- Photo: 1973 Mazda RX-4 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 1973 Mazda RX-4 1 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
- Photo: Mazda RX-4 first registered August 1973 by Charles01, CC BY-SA 3.0, via Wikimedia Commons
- Photo: Mazda RX-4 Hardtop by JAK SIE MASZ from Adelaide (South Australia), Australia, cropped and altered by uploader Mr.choppers, CC BY-SA 2.0, via Wikimedia Commons
- Photo: Techno-Classica 2025, Essen (P1046118) by Matti Blume, CC BY-SA 4.0, via Wikimedia Commons
The 1978 Mazda RX-4 Sedan Auto is a 110-hp 1.3-liter rotary sedan with a 3-speed jatco 3n71b automatic and rear-wheel drive. It is rated at 19 mpg combined.
It makes 110 horsepower and 117 lb-ft of torque. EPA fuel-economy estimates are 17 mpg city and 23 mpg highway (19 mpg combined).
The RX-4 has a curb weight of 2,620 lb.
| Spec | Value |
|---|---|
| Vehicle | |
| Body Type | Sedan |
| Powertrain | Gas |
| Engine | |
| Engine Type | 13B twin-rotor Wankel rotary, naturally aspirated |
| Displacement | 1.3 L |
| Horsepower | 110 hp |
| Torque | 117 lb-ft |
| Valvetrain | Twin-rotor Wankel (no poppet valves) |
| Injection Type | 4-barrel carburetor |
| Drivetrain | |
| Drive Type | RWD |
| Transmission | |
| Transmission | 3-speed Jatco 3N71B automatic |
| Fuel Economy | |
| City | 17 MPG |
| Highway | 23 MPG |
| Combined | 19 MPG |
| Suspension | |
| Front Suspension | Independent strut |
| Rear Suspension | Live axle |
| Brakes | |
| Front Brake Disc | Disc |
| Rear Brake Disc | Drum |
| Dimensions & Weight | |
| Width | 65.4 in |
| Height | 55.5 in |
| Wheelbase | 98.8 in |
| Cargo Volume | 11 ft³ |
| Curb Weight | 2,620 lbs |
Similar cars
Rivals to the 1978 Mazda RX-4 Sedan Auto with similar size, power and price from around the same years.
Safety & Recalls
No NHTSA data available for the 1978 Mazda RX-4.
Source: US National Highway Traffic Safety Administration (nhtsa.gov). US-market vehicles only; data cached for up to 7 days.