Caterpillar 621K vs Caterpillar 627K

	Caterpillar Caterpillar 621K	Caterpillar Caterpillar 627K
Operating weight	—	—
Engine power	—	—
Heaped capacity	≈18 m³ (24 yd³)	≈18 m³ (24 yd³)
Rated load	≈22,000 kg (48,500 lb)	—
Engine	Cat C13	—
Configuration	Single engine, open bowl	Twin engine, push-pull capable
Engines	—	Cat C13 (tractor) and C9.3 (scraper)
Strengths	+ Versatile mid-size capacity + Lower cost than twin-engine models + Cat dealer support	+ Excellent traction on grades + Push-pull loading without a dozer + Higher productivity in tough conditions
Watch-outs	− Needs a push dozer to load fully	− Higher purchase and running cost than single-engine models
	Full 621K review	Full 627K review

Specifications are typical figures for standard configurations and may be measured differently by each manufacturer (for example net vs gross power). Always confirm with the manufacturer or dealer. Build another comparison.