1970→1970 Plymouth Road Runner HEMI
For the 1970 model year, Plymouth updated the Road Runner design and continued to offer the potent big block options. Both the 440 and HEMI 426 were built as a response to the Buick GNX and Mustang Boss 429.
In Detail
| type | Series Production Car |
| production years | 1970 – 1970 |
| built at | USA |
| engine | HEMI V8 |
| position | Front Longitudinal |
| aspiration | Natural |
| block material | Cast Iron |
| valvetrain | Pushrod OHV |
| displacement | 6981 cc / 426 in³ |
| bore | 107.9 mm / 4.25 in |
| stroke | 95.300003 mm / 3.75 in |
| compression | 10.25:1 |
| power | 316.89999 kw / 425 bhp @ 5000 rpm |
| specific output | 60.88 bhp per litre |
| torque | 664.40002 nm / 490 ft lbs @ 4000 rpm |
| redline | 5500 |
| body / frame | Unitary Steel Monocoque |
| driven wheels | RWD |
| transmission | 4-Speed Manual |
Auction Sales History
1969 Plymouth Hemi Road Runner RM23J9A243163 – sold for $72,000 Original numbers matching Hemi. All major components are the same equipment that went into the car 45 years ago. Complete with original owners manual/broadcast sheet. Believed to be 90,005 actual miles. 1 of 166 “hemi” hardtop autos built in 1969. California car. Auction Source: Monterey 2014 by Mecum Auctions
