Fifth Wheel
Keystone RV Alpine 3851rd
Compare specs across all model years (2019–2021)
3
Model Years
6
Sleeps
41' 4"
Length
16,500
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2019 Alpine 3851rd
Best Choice
Lightest GVWR (16,500 lbs) makes it towable by more vehicles. Highest Mint Score (30.2).
What Changed Year-Over-Year
2020
2021
Tank Capacity Change
Fresh water capacity changed from 66 to 54 gallons.
All Model Years
2021
2021 Keystone RV Alpine 3851rd
29.9
16,500 lbs GVWR
2,745 lbs Hitch
41' 4"
Sleeps 6
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Check Towing
2020
2020 Keystone RV Alpine 3851rd
29.9
16,500 lbs GVWR
2,745 lbs Hitch
41' 4"
Sleeps 6
View Full Specs
Check Towing
Best Value
2019
2019 Keystone RV Alpine 3851rd
30.2
16,500 lbs GVWR
2,745 lbs Hitch
41' 4"
Sleeps 6
Original model year
View Full Specs
Check Towing
Can Your Vehicle Tow the Alpine 3851rd?
Enter your truck specs to see if any of these model years fit your towing capacity—and which year gives you the most safety margin.
Tip: Click a year to see the full specs, tow guidance, and recommended gear for that model year.
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