Class A
Thor Motor Coach Aria 3901
Compare specs across all model years (2017–2026)
10
Model Years
10
Sleeps
39' 11"
Length
35,320
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2026 Aria 3901
Best Choice
Highest Mint Score (29.4). Most powerful engine (360 HP).
What Changed Year-Over-Year
2017
2018
Capacity Upgrade
Sleeping capacity increased from 8 to 10 with layout improvements.
All Model Years
Best Value
2026
2026 Thor Motor Coach Aria 3901
29.4
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
View Full Specs
2025
2025 Thor Motor Coach Aria 3901
28.4
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
View Full Specs
2024
2024 Thor Motor Coach Aria 3901
28.4
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
View Full Specs
2023
2023 Thor Motor Coach Aria 3901
28.4
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
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2022
2022 Thor Motor Coach Aria 3901
28.4
35,320 lbs GVWR
40' 1"
Sleeps 10
360 HP
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2021
2021 Thor Motor Coach Aria 3901
28.4
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
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2020
2020 Thor Motor Coach Aria 3901
28.4
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
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2019
2019 Thor Motor Coach Aria 3901
28.7
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
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2018
2018 Thor Motor Coach Aria 3901
28.7
35,320 lbs GVWR
39' 11"
Sleeps 10
360 HP
↑ Sleeps 2 more than 2017
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2017
2017 Thor Motor Coach Aria 3901
29.2
35,320 lbs GVWR
39' 11"
Sleeps 8
360 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.
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