Class C
Thor Motor Coach Quantum Lf31
Compare specs across all model years (2016–2026)
11
Model Years
10
Sleeps
32' 8"
Length
14,500
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2017 Quantum Lf31
Best Choice
Highest Mint Score (26.9). Best living space layout.
What Changed Year-Over-Year
2022
2023
Engine Change
Horsepower changed from 350 to 325 HP.
2020
2021
More Power
Horsepower changed from 305 to 350 HP.
All Model Years
2026
2026 Thor Motor Coach Quantum Lf31
26.7
14,500 lbs GVWR
32' 8"
Sleeps 10
325 HP
View Full Specs
2025
2025 Thor Motor Coach Quantum Lf31
25.7
14,500 lbs GVWR
8,000 lbs Hitch
32' 8"
Sleeps 10
325 HP
View Full Specs
2024
2024 Thor Motor Coach Quantum Lf31
25.7
14,500 lbs GVWR
32' 8"
Sleeps 10
325 HP
View Full Specs
2023
2023 Thor Motor Coach Quantum Lf31
26.2
14,500 lbs GVWR
32' 8"
Sleeps 10
325 HP
↓ 25 HP less than 2022
View Full Specs
2022
2022 Thor Motor Coach Quantum Lf31
26.2
14,500 lbs GVWR
32' 8"
Sleeps 10
350 HP
View Full Specs
2021
2021 Thor Motor Coach Quantum Lf31
26.7
14,500 lbs GVWR
32' 7"
Sleeps 10
350 HP
↑ 45 HP more than 2020
View Full Specs
2020
2020 Thor Motor Coach Quantum Lf31
26.4
14,500 lbs GVWR
32' 7"
Sleeps 10
305 HP
View Full Specs
2019
2019 Thor Motor Coach Quantum Lf31
25.7
14,500 lbs GVWR
32' 7"
Sleeps 10
305 HP
View Full Specs
2018
2018 Thor Motor Coach Quantum Lf31
25.9
14,500 lbs GVWR
32' 7"
Sleeps 10
305 HP
View Full Specs
Best Value
2017
2017 Thor Motor Coach Quantum Lf31
26.9
14,500 lbs GVWR
32' 7"
Sleeps 10
305 HP
View Full Specs
2016
2016 Thor Motor Coach Quantum Lf31
26.9
14,500 lbs GVWR
32' 7"
Sleeps 10
305 HP
Original model year
View Full Specs
Tip: Click a year to see the full specs, tow guidance, and recommended gear for that model year.
Leave the Noise Behind.
Reconnect Outdoors.
Our mission is to help people make well-informed RV buying decisions, so they can leave the noise and screens behind, reconnect with family, and create unforgettable memories in the great outdoors.
Free tools. No sales pressure. Just better decisions.