Rank #10 in Adult LEGO - Technic & Mechanical
LEGO Technic Liebherr R 9800 Excavator (42100)
by LEGO · Adult 16+
Motorized, app-controlled excavator. The most engineering payoff in Technic.
Best price at
Amazon
Price checked Oct 7, 2026
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👑 Premium PickWhat we like
- ↑Motorized - fully app-controlled
- ↑Detailed working excavator mechanics
- ↑Authentic Liebherr construction-machine styling
- ↑Premium engineering complexity
- ↑Includes Smart Hub and 7 motors
Worth knowing
- ↓Premium pricing - flagship Technic
- ↓Multi-day complex build
- ↓Smart Hub requires battery installation
What buyers say
Based on 82 buyer mentionsBuyers praise build quality, building experience and complexity.
↑ Build quality↑ Building experience↑ Complexity
Specs
- Pieces
- 4108
- Dimensions
- 26in L
- Build Time
- 30+ hours
- Cost Per Piece
- $0.10
- Theme
- Technic
- Motors
- 7
- Mechanics
- Motorized with app control
Full buying guide