1978 Porsche 911 SC Targa 5MT
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All photo credits
- Photo: Classic Days 2019, Berlin (CDB90132) by Matti Blume, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 1980 Porsche 911 SC 3.0L 1 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 1981 Porsche 911 3.0 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
- Photo: Porsche 911 SC at Schaffen-Diest 2018 by Charles01, CC BY-SA 4.0, via Wikimedia Commons
- Photo: ADAC Deutschland Klassik 2025, Heidelberg (20250726-P1048705) by Matti Blume, CC BY-SA 4.0, via Wikimedia Commons
The 1978 Porsche 911 SC Targa 5MT is a 177-hp 3.0-liter flat-6 with a 5-speed manual and rear-wheel drive. It is rated at 19 mpg combined.
It makes 177 horsepower at 5,500 rpm and 195 lb-ft of torque at 4200 rpm. EPA fuel-economy estimates are 15 mpg city and 27 mpg highway (19 mpg combined).
The 911 measures 168.9 inches long on a 89.3-inch wheelbase.
| Spec | Value |
|---|---|
| Vehicle | |
| Body Type | Coupe |
| Powertrain | Gas |
| Engine | |
| Engine Type | 3.0L air-cooled SOHC flat-6 |
| Displacement | 3 L |
| Horsepower | 177 hp @ 5,500 rpm |
| Torque | 195 lb-ft @ 4200 rpm |
| Valvetrain | SOHC, 2 valves/cylinder |
| Bore and Stroke | 95 x 70.4 mm |
| Injection Type | Bosch K-Jetronic CIS |
| Drivetrain | |
| Drive Type | Rear-wheel drive |
| Transmission | |
| Transmission | 5-speed manual |
| Fuel Economy | |
| City | 15 MPG |
| Highway | 27 MPG |
| Combined | 19 MPG |
| Suspension | |
| Front Suspension | MacPherson strut |
| Rear Suspension | Independent semi-trailing arms |
| Tires & Wheels | |
| Tires Front | 185/70 VR 15 |
| Tires Rear | 185/70 VR 15 |
| Dimensions & Weight | |
| Length | 168.9 in |
| Wheelbase | 89.3 in |
Similar cars
Rivals to the 1978 Porsche 911 SC Targa 5MT with similar size, power and price from around the same years.
Safety & Recalls
NCAP safety ratings
Not crash-tested by NHTSA for this model year.
Recalls
1 recall on file with NHTSA for the 1978 Porsche 911. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.
May 22, 1978 · EQUIPMENT:OTHER:LABELS
ON THE INVOLVED VEHICLES, THE IDENTIFICATION OF THE FUNCTIONS OF THE AUTOMATIC SPEED CONTROL SYSTEM WAS OMITTED. THIS FAILS TO COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 101, "CONTROLS AND DISPLAYS".
Remedy: A PLASTIC IDENTIFICATION LABEL WILL BE PERMANENTLY AFFIXED TO THE INSTRUMENT PANEL.
NHTSA campaign 78V113000
Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 1978 PORSCHE 911. US-market vehicles only; data cached for up to 7 days.