1968 Dodge Coronet R/T Engine Options and Specifications
In 1968 the Dodge Coronet R/T could be ordered with two different high performance engine options.
For the 1968 Coronet R/T, the 440 High Performance 4 barrel engine was the standard engine. One engine option was available which was the 426 Hemi.
This article will include the 1968 Dodge Coronet R/T engine options and their specifications. This includes the engine code, cost, displacement, horsepower, torque, compression ratio, camshaft, lifter type, valve sizes, bore, stroke, air cleaner, exhaust, fuel and carburetion.
1968 Dodge Coronet R/T Engine Options and Specifications
The 1968 Coronet R/T was available with the following two engines.
- 440 High Performance 4-barrel (Standard)
- 426 Hemi (Optional)
The 440 high performance was carried over from the previous year Coronet R/T with basically no changes. The 426 Hemi was also carried over and had a slightly different camshaft but had the same rated power numbers as the year before.
1968 Coronet R/T With a 440 High Performance 4-barrel
The 440 High Performance 4-barrel was available as the standard engine for the 1968 Coronet R/T. The engine code was 83. Let’s take a look at the specifications.
| Specifications | 440 4-barrel |
| Displacement | 440 |
| Bore and Stroke | 4.32″ x 3.75″ |
| Horsepower | 375 @ 4,600 RPM |
| Torque | 480 @ 3,200 RPM |
| Compression Ratio | 10.1:1 |
| Camshaft | High lift, long duration, high overlap |
| Cam Duration/Overlap | 268°/284°/46° |
| Cam Lift | .450″/.458″ |
| Lifter Type | Hydraulic |
| Valve Diameter, Intake | 2.08″ |
| Valve Diameter, Exhaust | 1.74″ |
| Carburetion | Single Carter 4-bbl |
| Air Cleaner | Dual Snorkel |
| Exhaust System | Dual, low restriction |
| Fuel Recommended | Premium |
1968 Coronet R/T With a 426 Hemi
The 426 Hemi was available as an option for the 1968 Coronet R/T. The engine order code was 73 and cost an extra $604.75. Let’s take a look at the specifications.
| Specifications | 426 Hemi |
| Displacement | 426 |
| Bore and Stroke | 4.25″ x 3.75″ |
| Horsepower | 425 @ 5,000 RPM |
| Torque | 490 @ 4,000 RPM |
| Compression Ratio | 10.25:1 |
| Camshaft | High lift, long duration, high overlap |
| Cam Duration/Overlap | 284°/284°/60° |
| Cam Lift | .490″/.481″ |
| Lifter Type | Mechanical |
| Valve Diameter, Intake | 2.25″ |
| Valve Diameter, Exhaust | 1.94″ |
| Carburetion | Dual Carter 4-bbl |
| Air Cleaner | Unsilenced |
| Exhaust System | Dual, low restriction |
| Fuel Recommended | Premium |
That’s the complete list of engines available for the 1968 Coronet R/T. If you have any questions to ask me about the engine options or specifications for the 1968 Coronet R/T car model, send us an email found specifically on my contact page or comment below.
About 38 years ago I assembled my first Mopar engine, it was for a 1970 ‘Cuda. It’s at that time my hands on experience with Mopar cars and engines, including the 440, started. Although my research of the engines started years earlier.
Read More B-body Coronet R/T Articles
1967 Dodge Coronet R/T Engine Options and Specs
Article Resources
- 1968 Dodge Service Manual
- Google Books: Chrysler Engines 1922-1998
