Compare/Caterpillar D7D vs Caterpillar RD8

Caterpillar D7D vs Caterpillar RD8

Verdict: Caterpillar D7D vs Caterpillar RD8

The Caterpillar D7D and the Caterpillar RD8 are both tractors — here is how they stack up on the figures that matter. Caterpillar D7D leads on rated power with 110 hp against 104 hp. Caterpillar D7D is the lighter machine (11,036 kg vs 15,195 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Caterpillar D7D is the newer design (1959 vs 1935). In short: choose the Caterpillar D7D for outright pulling power, or the Caterpillar RD8 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Caterpillar

Fit score

Best match

Clear

Caterpillar

Fit score

Best match

Clear

Rated power

110 hp

104 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

CaterpillarReference

Gear 1 used for pull test.Reference

Diesel 6-speed crawlerMay 19 - 25, 1936Link: Nebraska Tractor Test 257 fileReference

Drive

crawlerReference

Steering

manual clutchesReference

—

Engine

Fuel tank

246.0 LReference

—

Drawbar (tested)

81.9 kWReference

77.5 kWReference

Displacement

13.6 LReference

20.4 LReference

Bore/Stroke

146 x 203 mmReference

Air cleaner

oil bathReference

—

Compression

15.7:1Reference

—

Rated RPM

1200Reference

1000Reference

Starter type

2-cylinder pony engineReference

—

Max power

81.9 kWReference

77.5 kWReference

Belt (tested)

—

88.2 kWReference

Belt power (max)

—

88.2 kWReference

Transmission

Type

gearReference

Gears

5 forward and 4 reverseReference

6 forward and 2 reverseReference

Clutch

dry metallic discReference

dry discReference

Oil capacity

37.9 LReference

—

Dimensions

Weight

11036 kgReference

15195 kgReference

Length

412 cmReference

—

Height (hood)

203 cmReference

—

Shipping weight

11036 kgReference

—

Ground clearance

39 cmReference

—

Clearance (drawbar)

43 cmReference

—

Gauge

187 cmReference

198 cmReference

Caterpillar D7D Tracks

Width

246 cmReference

50 cmReference

Test results

Fuel use

31.4 l/hourReference

—

Max pull

12825 kgReference

8979 kgReference

Belt fuel use (max)

—

32.6 l/hourReference

RD8 Serial Numbers

1935

—

1H1Reference

1936

—

1H247Reference

1937

—

1H1497Reference

Caterpillar RD8 Tracks

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.