Detailed Evaluation & Buyer Recommendation
Harris Boats Crowne Sl 270 2021 vs Harris Boats Grand Mariner 270 2021 — Same Brand, Different Boat
The Harris Boats Crowne Sl 270 2021 vs Harris Boats Grand Mariner 270 2021 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
Both boats are rated for 8 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The Harris Boats Crowne Sl 270 2021 and Harris Boats Grand Mariner 270 2021 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.
Measurements / Dimensions
Length overall - Detail28.00 ft
Length overall - Detail27.00 ft
Length - Feet28
Length - Feet27
Length overall - Meters8.53
Length overall - Meters8.23
Length overall - Inches336
Length overall - Inches324
Draft [max] - Detail2.67 ft
Draft [max] - Detail1.75 ft
Draft [max] - Meters0.81
Draft [max] - Meters0.53
Draft [max] - Inches32
Draft [max] - Inches21
Draft Min1.25 ft
Draft Min1.08 ft
Engine and Drivetrain
Fuel tank capacity - Gal63
Fuel tank capacity - Gal37
Fuel tank capacity - Liters238.48
Fuel tank capacity - Liters140.06
Operational Info
Boat typePower
Boat typePower
Harris Boats Crowne Sl 270 2021 vs Harris Boats Grand Mariner 270 2021 — Common Questions
Which is the larger boat — the Harris Boats Crowne Sl 270 2021 or the Harris Boats Grand Mariner 270 2021?
The Harris Boats Crowne Sl 270 2021 is the longer of the two at 28,0 feet overall. The Harris Boats Grand Mariner 270 2021 comes in at 27,0 feet, making it roughly 1,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
How many people can each boat hold?
The Harris Boats Crowne Sl 270 2021 is Coast Guard rated for 8 passengers, while the Harris Boats Grand Mariner 270 2021 is certified for 8. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Which boat has the larger fuel tank — the Harris Boats Crowne Sl 270 2021 or the Harris Boats Grand Mariner 270 2021?
The Harris Boats Crowne Sl 270 2021 has the bigger tank at 63 gallons, versus 37 gallons on the Harris Boats Grand Mariner 270 2021. That 26-gallon difference translates to roughly 78–130 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Harris Boats Crowne Sl 270 2021 and Harris Boats Grand Mariner 270 2021 from the same manufacturer?
Yes — both the Harris Boats Crowne Sl 270 2021 and the Harris Boats Grand Mariner 270 2021 are built by Harris Boats. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.