1981 Engines - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 3 (permalink) Old 03-12-2008, 03:57 PM Thread Starter
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1981 Engines

Here is a list of the 1981 model-year engines, taken from On-Highway Trucks, Powertrains and Suspension Systems authored by Robert N. Brady:

(List is abridged to U.S. manufacturers only)

CATERPILLAR (all 3300 and 3400 series engines are turbocharged and aftercooled)

3208 Mid-Range Engines
3208 NA: 160 hp @ 2800 rpm, 365 lb/ft tq @ 1400 rpm
3208 NA: 165 hp @ 2600 rpm, 398 lb/ft tq @ 1300 rpm
3208 NA: 175 hp @ 2800 rpm, 405 lb/ft tq @ 1400 rpm
3208 NA: 185 hp @ 2600 rpm, 452 lb/ft tq @ 1400 rpm
3208 NA: 210 hp @ 2800 rpm, 500 lb/ft tq @ 1400 rpm
3208 T: 225 hp @ 2600 rpm, 585 lb/ft tq @ 1400 rpm
3208 T: 250 hp @ 2600 rpm, 640 lb/ft tq @ 1400 rpm

Economy Rating:
3208 T: 200 hp @ 2000 rpm, 620 lb/ft tq @ 1400 rpm

California Ratings:
3208 NA: 175 hp @ 2800 rpm, 425 lb/ft tq @ 1400 rpm
3208 NA: 200 hp @ 2800 rpm, 490 lb/ft tq @ 1400 rpm
3208 T: 210 hp @ 2600 rpm, 575 lb/ft tq @ 1400 rpm

3306 Heavy-Duty Engines
3306 TA: 250 hp @ 2200 rpm, 690 lb/ft tq @ 1400 rpm
3306 DITA: 245 hp @ 2200 rpm, 820 lb/ft tq @ 1300 rpm
3306 DITA: 270 hp @ 2200 rpm, 775 lb/ft tq @ 1400 rpm
(last two engines were 50-state certified through 1982)

3400 Series Heavy-Duty Engines
Economy Ratings:
3406A TA: 250 hp @ 1600 rpm, 1000 lb/ft tq @ 1200 rpm
3406A TA: 285 hp @ 1600 rpm, 1080 lb/ft tq @ 1200 rpm
3406A TA: 290 hp @ 1900 rpm, 1000 lb/ft tq @ 1200 rpm
3406A TA: 300 hp @ 1600 rpm, 1200 lb/ft tq @ 1200 rpm
3406A TA: 305 hp @ 1900 rpm, 1050 lb/ft tq @ 1200 rpm
3406A TA: 330 hp @ 1600 rpm, 1320 lb/ft tq @ 1200 rpm
3406A TA: 350 hp @ 1900 rpm, 1165 lb/ft tq @ 1200 rpm
3408A TA: 420 hp @ 1900 rpm, 1460 lb/ft tq @ 1200 rpm

Vocational Ratings:
3406A TA: 280 hp @ 2100 rpm, 1015 lb/ft tq @ 1200 rpm
3406A TA: 325 hp @ 2100 rpm, 1050 lb/ft tq @ 1200 rpm
3406A TA: 400 hp @ 2100 rpm, 1265 lb/ft tq @ 1300 rpm
3408A TA: 450 hp @ 2100 rpm, 1460 lb/ft tq @ 1200 rpm

California Ratings:
(Economy)
3406A TA: 300 hp @ 1900 rpm, 1054 lb/ft tq @ 1200 rpm

(Vocational)
3406A TA: 300 hp @ 2100 rpm, 1054 lb/ft tq @ 1200 rpm
3406A TA: 380 hp @ 2100 rpm, 1285 lb/ft tq @ 1200 rpm
3408A TA: 450 hp @ 2100 rpm, 1350 lb/ft tq @ 1500 rpm

CUMMINS

V-555 Series Mid-Range Engine
VT-225: 225 hp @ 3000 rpm, 445 lb/ft tq @ 1900 rpm

V-903 Series Heavy-Duty Engines
Formula Rating:
Formula VT-300: 300 hp @ 2100 rpm, 860 lb/ft tq @ 1500 rpm

Vocational Rating:
VT-350: 350 hp @ 2400 rpm, 860 lb/ft tq @ 1500 rpm

NT-855 Heavy-Duty Engines
Formula Ratings:
Formula 240: 240 hp @ 1800 rpm, 900 lb/ft tq @ 1300 rpm
Formula 270: 270 hp @ 1800 rpm, 1000 lb/ft tq @ 1300 rpm
Formula 300: 300 hp @ 1800 rpm, 1000 lb/ft tq @ 1300 rpm
Formula 350: 350 hp @ 1800 rpm, 1120 lb/ft tq @ 1300 rpm
Formula 450: 450 hp @ 1900 rpm, 1420 lb/ft tq @ 1300 rpm

Fleet Rating:
Fleet 270: 270 hp @ 1600 rpm, 1020 lb/ft tq @ 1100 rpm

Power Torque Ratings:
Power Torque 240: 240 hp @ 2100 rpm, 900 lb/ft tq @ 1300 rpm
Power Torque 270: 270 hp @ 2100 rpm, 1000 lb/ft tq @ 1300 rpm

Vocational Ratings:
NTC-300: 300 hp @ 2100 rpm, 1000 lb/ft tq @ 1300 rpm
NTC-350: 350 hp @ 2100 rpm, 1120 lb/ft tq @ 1300 rpm
NTC-400: 400 hp @ 2100 rpm, 1150 lb/ft tq @ 1500 rpm
Twin Turbo 475: 475 hp @ 2100 rpm, 1430 lb/ft tq @ 1400 rpm

KT-1150 Series Heavy-Duty Engines
Formula Ratings:
Formula 525: 525 hp @ 1900 rpm, 1650 lb/ft tq @ 1300 rpm

Vocational Ratings:
KT-450: 450 hp @ 2100 rpm, 1350 lb/ft tq @ 1500 rpm
KTA-525: 525 hp @ 2100 rpm, 1650 lb/ft tq @ 1300 rpm
KTA-600: 600 hp @ 2100 rpm, 1650 lb/ft tq @ 1600 rpm

DETROIT DIESEL ALLISON

8.2L "Fuel Pincher" Mid-Range Engines
8.2LN: 165 hp @ 3000 rpm, 350 lb/ft tq @ 1200 rpm
8.2LT: 205 hp @ 3000 rpm, 430 lb/ft tq @ 1700 rpm

Series 53 Mid-Range Engines
4-53T-5A60: 170 hp @ 2500 rpm, 402 lb/ft tq @ 1800 rpm
6V-53T-5A50: 225 hp @ 2600 rpm, 550 lb/ft tq @ 1800 rpm

Series 71 Heavy-Duty Engines
6-71N-7E60: 215 hp @ 2100 rpm, 611 lb/ft tq @ 1200 rpm
6-71N-7E65: 240 hp @ 2100 rpm, 611 lb/ft tq @ 1600 rpm
6-71TT-7E75: 230 hp @ 1950 rpm, 853 lb/ft tq @ 1000 rpm
6-71T-7C75: 275 hp @ 2100 rpm, 801 lb/ft tq @ 1400 rpm
8V-71N-7E55: 265 hp @ 2100 rpm, 766 lb/ft tq @ 1200 rpm
8V-71N-7E60: 280 hp @ 2100 rpm, 782 lb/ft tq @ 1200 rpm
8V-71N-7E65: 304 hp @ 2100 rpm, 818 lb/ft tq @ 1400 rpm
8V-71TTA-7C75: 305 hp @ 1950 rpm, 1064 lb/ft tq @ 1200 rpm
8V-71TTA-7C75: 345 hp @ 1800 rpm, 1064 lb/ft tq @ 1200 rpm
8V-71TA-7C75: 370 hp @ 2100 rpm, 1064 lb/ft tq @ 1200 rpm

California ratings
6-71TAC-7G75: 270 hp @ 2100 rpm, 783 lb/ft tq @ 1200 rpm

Series 92 Heavy-Duty Engines
6V-92TTA-9B90: 270 hp @ 1950 rpm, 957 lb/ft tq @ 1200 rpm
6V-92TTA-9B90: 307 hp @ 1800 rpm, 957 lb/ft tq @ 1200 rpm
6V-92TA-9B90: 335 hp @ 2100 rpm, 957 lb/ft tq @ 1200 rpm
8V-92TTA-9A90: 365 hp @ 1950 rpm, 1242 lb/ft tq @ 1400 rpm
8V-92TTA-9A90: 404 hp @ 1800 rpm, 1242 lb/ft tq @ 1400 rpm
8V-92TA-9A90: 435 hp @ 2100 rpm, 1242 lb/ft tq @ 1400 rpm

California ratings
6V-92TTAC-9C90: 270 hp @ 1950 rpm, 921 lb/ft tq @ 1300 rpm
6V-92TAC-9C90: 305 hp @ 2100 rpm, 921 lb/ft tq @ 1300 rpm
8V-92TTAC-9C90: 365 hp @ 1950 rpm, 1236 lb/ft tq @ 1300 rpm
8V-92TAC-9C90: 405 hp @ 2100 rpm, 1236 lb/ft tq @ 1300 rpm

INTERNATIONAL HARVESTER

9.0L Mid-Range Engines
9.0L: 165 hp @ 2800 rpm, 366 lb/ft tq @ 1200 rpm
9.0L: 180 hp @ 2800 rpm, 401 lb/ft tq @ 1200 rpm

California rating:
9.0L: 175 hp @ 2800 rpm, 375 lb/ft tq @ 1200 rpm

DT-466B Mid-Range Engines
DT-466B: 180 hp @ 2600 rpm, 421 lb/ft tq @ 1800 rpm
DT-466B: 210 hp @ 2600 rpm, 488 lb/ft tq @ 1800 rpm

California rating:
DTI-466B: 210 hp @ 2600 rpm, 488 lb/ft tq @ 1800 rpm

V-800 Heavy-Duty Engines
V-800: 280 hp @ 2600 rpm, 812 lb/ft tq @ 1600 rpm
V-800: 300 hp @ 2600 rpm, 725 lb/ft tq @ 1600 rpm
V-800: 350 hp @ 2600 rpm, 825 lb/ft tq @ 1600 rpm

MACK TRUCKS

E4-210 Mid-Range Engine
E4-210: 210 hp @ 2400 rpm, 531 lb/ft tq @ 1500 rpm

END-673 Heavy Duty Engines
"Econodyne" Economy Ratings
EM6-237R: 237 hp @ 1800 rpm, 906 lb/ft tq @ 1200 rpm
EM6-285R: 285 hp @ 1700 rpm, 1080 lb/ft tq @ 1200 rpm
EMC6-285R: 285 hp @ 1700 rpm, 1080 lb/ft tq @ 1200 rpm
E6-315R: 315 hp @ 1800 rpm, 1050 lb/ft tq @ 1450 rpm
E6-350R: 350 hp @ 1800 rpm, 1130 lb/ft tq @ 1400 rpm

Vocational Ratings
E6-200: 200 hp @ 2100 rpm, 600 lb/ft tq @ 1500 rpm
E6-250: 250 hp @ 2100 rpm, 750 lb/ft tq @ 1500 rpm
EC6-235: 235 hp @ 2100 rpm, 700 lb/ft tq @ 1500 rpm
EM6-237: 237 hp @ 2100 rpm, 906 lb/ft tq @ 1200 rpm
EM6-285: 285 hp @ 2100 rpm, 1080 lb/ft tq @ 1200 rpm
EMC6-285: 285 hp @ 2100 rpm, 1080 lb/ft tq @ 1200 rpm
E6-315: 315 hp @ 1900 rpm, 1050 lb/ft tq @ 1450 rpm
E6-350: 350 hp @ 1900 rpm, 1130 lb/ft tq @ 1450 rpm
EC6-350: 350 hp @ 1950 rpm, 1065 lb/ft tq @ 1400 rpm

ENDT-1000 Maxidyne Heavy-Duty Engines
"Econodyne" Economy Ratings
EM9-400R: 400 hp @ 1700 rpm, 1520 lb/ft tq @ 1230 rpm
EMC9-400R: 400 hp @ 1700 rpm, 1520 lb/ft tq @ 1230 rpm

Vocational Ratings
EM9-400: 400 hp @ 2100 rpm, 1520 lb/ft tq @ 1230 rpm
EMC9-400: 400 hp @ 2100 rpm, 1520 lb/ft tq @ 1230 rpm

~Ben (Gillig8V71)
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post #2 of 3 (permalink) Old 03-12-2008, 06:39 PM
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Hey thanks! I always wondered about ratings in certain years. If you get any more years, post 'em up here. We like stuff like that!
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post #3 of 3 (permalink) Old 03-16-2008, 07:45 PM
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Here is some old Cummins specs from the early 60's to 70something.

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