| Chrysler Slant Six (G, RG) engine | |
|---|---|
 "Super 225" in a 1965 Plymouth Barracuda | |
| Overview | |
| Manufacturer | Chrysler Corporation |
| Production | 1959–2000 Indianapolis Foundry Trenton Engine Plant |
| Layout | |
| Configuration | I6 |
| Displacement | 170 cu in (2.8 L) 198 cu in (3.2 L) 225 cu in (3.7 L) |
| Cylinder bore | 3+2⁄5 in (86.4 mm) |
| Piston stroke | 3+1⁄8 in (79.4 mm) 3+16⁄25 in (92.5 mm) 4+1⁄8 in (104.8 mm) |
| Cylinder block material | Cast iron Aluminum |
| Cylinder head material | Cast iron |
| Valvetrain | OHV 2 valves per cylinder |
| Compression ratio | 8.2:1–8.5:1 |
| Combustion | |
| Fuel system | Carburetor |
| Fuel type | Gasoline |
| Oil system | Full pressure w/full-flow filter & gerotor oil pump |
| Cooling system | Jacketed block, Water pump to radiator |
| Chronology | |
| Predecessor | Flathead 218 and 230" I6 |
| Successor | 239 cu in (3.9 L) V6 215-245-265 Hemi-6 (Australia only) |
The Slant-Six is the popular name for a Chrysler inline-6 internal combustion engine with an overhead valve reverse-flow cylinder head and cylinder bank inclined at a 30-degree angle from vertical. Introduced in 1959 for the 1960 models, it was known within Chrysler as the G-engine. It was a clean-sheet design that began production in 1959 at 170 cubic inches (2.8 L) and ended in 2000 at 225 cubic inches (3.7 L). It was a direct replacement for the flathead Chrysler straight six that the company started business with in 1925 until the old design was discontinued in the 1960s.