# Detroit Diesel Series 92

The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. The series was introduced in 1974 as a rebored version of its then-popular sister series, the Series 71. Both the Series 71 and Series 92 engines were popularly used in on-highway vehicle applications.

## History

The Series 92 engines were introduced in 1974. Compared to the Series 71 engines they were derived from, the Series 92 featured a larger bore of 4.84025 ± 0.00125 in (122.942 ± 0.032 mm) and an identical stroke of 5 in (130 mm) for a nominal displacement per cylinder of 92 cu in (1,510 cc), from which the Series 92 derives its name.
While the basic mechanics of the 92 series indicated superior performance and durability, early prototypes were challenged by breakdowns resulting from the torque inherent in the design. Carl Kamradt, the senior engineer in Detroit Diesel Allison's E5, or Experimental Department, was responsible for working through the practical applications of the engine, resulting in the 92 Series becoming the favored choice for applications requiring high torque and dependability. Upon Mr. Kamradt's retirement in 1984, the E-5 division was eliminated as the 92 Series ran its course. In the 1980s and early 1990s, the Series 92 was used as a major bus engine in North America. It was also available for several other applications: Trucks, buses, motor homes, construction, fire trucks/apparatus, industrial equipment, several military vehicles, aircraft and marine applications.
The Series 92 left the market in the summer of 1995 and the four stroke Detroit Diesel engine Series 60 was introduced as a replacement.

## Features and specifications

* 9.0 litre (V6), 12.1 litre (V8), 18.1 litre (V12) and 24.1 litre (V16)
* Power ratings ranging from 253 to 950 horsepower (189 to 708 kW)
* Supported the DDECI, DDECII, DDECIII and DDECIV.
* Gear
Power output for selected models :
| Family | Model | Torque | Power |
| 6V92 | 6V92 | 737 ft⋅lbf (999 N⋅m) @ 1400 rpm | 270 hp (200 kW) @ 2100 rpm |
| 6V92 | 6V92T | 890 ft⋅lbf (1,210 N⋅m) @ 1400 rpm | 322 hp (240 kW) @ 2100 rpm |
| 6V92 | 6V92TA | 957 ft⋅lbf (1,298 N⋅m) @ 1300 rpm | 335 hp (250 kW) @ 2100 rpm |
| 6V92 | 6V92TTA | 957 ft⋅lbf (1,298 N⋅m) @ 1300 rpm | 307 hp (229 kW) @ 1900 rpm |
| 8V92 | 8V92 | 983 ft⋅lbf (1,333 N⋅m) @ 1400 rpm | 360 hp (270 kW) @ 2100 rpm |
| 8V92 | 8V92T | 1,186 ft⋅lbf (1,608 N⋅m) @ 1400 rpm | 430 hp (320 kW) @ 2100 rpm |
| 8V92 | 8V92TA | 1,242 ft⋅lbf (1,684 N⋅m) @ 1400 rpm | 435 hp (324 kW) @ 2100 rpm |
| 8V92 | 8V92TTA | 1,242 ft⋅lbf (1,684 N⋅m) @ 1400 rpm | 365 hp (272 kW) @ 1950 rpm |
| 12V92 (two joined 6V92 engine blocks) | 12V92 | 1,879 ft⋅lbf (2,548 N⋅m) @ 1300 rpm | 665 hp (496 kW) @ 2100 rpm |
| 12V92 (two joined 6V92 engine blocks) | 12V92TA | 1,845–2,040 ft⋅lbf (2,501–2,766 N⋅m) @ 1200 rpm | 625–700 hp (466–522 kW) @ 2100 rpm |
| 16V92 (two joined 8V92 engine blocks) | 16V92TA | 2,370–2,755 ft⋅lbf (3,213–3,735 N⋅m) @ 1200 rpm | 850–960 hp (630–720 kW) @ 2100 rpm |

### Power output specifications (6V92)

* 775 ft⋅lbf (1,051 N⋅m) @ 1200 rpm; 253 horsepower governed at 2100 rpm
* 816 ft⋅lbf (1,106 N⋅m) @ 1200 rpm; 277 horsepower governed at 2100 rpm
* 957 ft⋅lbf (1,298 N⋅m) @ 1300 rpm; 300 horsepower governed at 2100 rpm
* 1,020 ft⋅lbf (1,380 N⋅m) @ 1300 rpm; 335 horsepower governed at 2100 rpm

### Power output specifications (8V92)

* 1,250 lb⋅ft (1,690 N⋅m) @ 1300 rpm; 350-550 horsepower governed at 1800-2100 rpm

## Model number

The model number indicates the basic configuration of the engine.$^{:7}$ The model designator consists of the number of cylinders (6, 8, 12, or 16), the block layout (V), engine series (92), and a lettered suffix which provides information about forced induction (T for turbocharged, A for aftercooled), so for instance, an 8V92TA designates a Series 92 V8 engine that is turbocharged and aftercooled.
| 8 | 08 | 3 | 7 | 0 | 00 |
| Model designator | Number of cylinders | Application designation | Basic engine arrangement and drive shaft rotation | Design variation | Specific model number |
| 8 = Series 92, vee arrangement | | 2 = Marine | 3 = LC (left hand rotation, starter on right bank) | 0 = 4 valve head | |
| | | 3 = Industrial F-F | 4 = LD (left hand rotation, starter on left bank) | 3 = Turbocharged without aftercooling | |
| | | 5 = Generator | 7 = RC (right hand rotation, starter on right bank) | 4 = Turbocharged and aftercooled | |
| | | 7 = Vehicle F-F | 8 = RD (right hand rotation, starter on left bank) | 5 = Customer special engine | |
| | | 8 = Vehicle F-F | | 7 = Constant horsepower (TT) | |
| | | | | 8 = Constant horsepower (TTA, California & Federal Certified) | |

### Notes

* 1 2 3 4 As viewed from the front of the engine
* 1 2 3 "Fan to Flywheel"

## Detroit Diesel (2 cycle) common model and suffix codes

| Model codes | |
| L | Low profile |
| V | V-block |
| N | Needle Unit Injectors, four exhaust valves (per cylinder) |
| T | Turbocharged |
| TA | Turbocharged Aftercooled (JWAC Jacket Water Aftercooled ) |
| TAC | Turbocharged Aftercooled California Certification (JWAC Jacket Water Aftercooled ) |
| TT | Tailored Torque (Fuel Squeezer) |
| TTA | Tailored Torque Aftercooled (Fuel Squeezer Plus) (JWAC Jacket Water Aftercooled ) |
| TI | Turbocharged Intercooled |
| TIB | Turbocharged Intercooled Bypass Blower |

## Competing power plants

* Detroit Diesel 6-71 (inline)
* Detroit Diesel 8V71
* Caterpillar 3406
* Cummins L10
* International HT530
* Cummins 6CTA8.3
* Detroit Diesel Series 60