Crownline 21 Classic 2006 vs Crownline 340 CR 2007 - Boat Spec Comparison

Q: Which is the larger boat — the Crownline 21 Classic 2006 or the Crownline 340 CR 2007?

The Crownline 340 CR 2007 is the longer of the two at 36,0 feet overall. The Crownline 21 Classic 2006 comes in at 2,0 feet, making it roughly 34,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: Which boat can handle a bigger outboard?

The Crownline 340 CR 2007 is rated to a maximum of 850 hp, giving it the larger power ceiling. The Crownline 21 Classic 2006 tops out at 320 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.

Q: How many people can each boat hold?

The Crownline 21 Classic 2006 is Coast Guard rated for 1 passengers, while the Crownline 340 CR 2007 is certified for 10. 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.

Q: Which boat is wider, and does it affect trailering?

The Crownline 21 Classic 2006 measures 102" wide, compared to 14" for the Crownline 340 CR 2007. The US standard-width towing limit is 8’6" (102") in most states — anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.

Q: Which boat has the larger fuel tank — the Crownline 21 Classic 2006 or the Crownline 340 CR 2007?

The Crownline 340 CR 2007 has the bigger tank at 193 gallons, versus 41 gallons on the Crownline 21 Classic 2006. That 152-gallon difference translates to roughly 456–760 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Q: Are the Crownline 21 Classic 2006 and Crownline 340 CR 2007 from the same manufacturer?

Yes — both the Crownline 21 Classic 2006 and the Crownline 340 CR 2007 are built by Crownline. 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.

Boat Comparison

Crownline 21 Classic 2006 vs Crownline 340 CR 2007

Crownline

Crownline 21 Classic 2006

2006

View full specs →

Crownline

Crownline 340 CR 2007

2007

View full specs →

Detailed Evaluation & Buyer Recommendation

Crownline 21 Classic 2006 vs Crownline 340 CR 2007 — Same Brand, Different Boat

The Crownline 21 Classic 2006 vs Crownline 340 CR 2007 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.

The power gap is worth calling out. Rated to 850 hp, the Crownline 340 CR 2007 has a 530-hp advantage over the Crownline 21 Classic 2006's 320-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Crownline 340 CR 2007 carries 193 gallons versus 41 gallons in the Crownline 21 Classic 2006. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Crownline 340 CR 2007 is rated for 10 passengers, while the Crownline 21 Classic 2006 caps at 1. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Crownline 340 CR 2007 could be the deciding factor.

Bottom line: Choose the Crownline 340 CR 2007 if your priority is putting more people on the water — it handles 10 passengers and at 36,0 ft it has the deck room to back that rating up comfortably. The Crownline 21 Classic 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 1 that costs less to run day-to-day.

General Boat Info

MakeCrownline

Model21 Classic

Model340 CR

Model Year2006

Model Year2007

Measurements / Dimensions

Beam102 in. (2.5 m)

Beam140 in. (3.6 m)

Beam - Meters2.59

Beam - Meters3.56

Beam - Inches102

Beam - Inches14

Bridge clearance - Detail49.25 in. (1.3 m)

Bridge clearance - Detailw/ Hardtop: 108 in. (3.2 m)

Bridge clearance - Meters1.24

Bridge clearance - Meters2.74

Bridge clearance - Inches49.25

Bridge clearance - Inches108

Deadrise16℃

Deadrise18℃

Draft [drive up] - Detail16 in. (41 cm)

Draft [drive up] - Detail17 in. (43 cm)

Draft [drive up] meters0.41

Draft [drive up] meters0.43

Draft [drive up] inches16

Draft [drive up] inches17

Draft [max] - Detail30 in. (76 cm)

Draft [max] - Detail35 in. (88 cm)

Draft [max] - Meters0.76

Draft [max] - Meters0.89

Draft [max] - Inches3

Draft [max] - Inches35

Weight - Detail3,500 - 3,700 lbs. (1,588 - 1,678 kg)

Weight - Detailnot available

Weight - kg1678.29

Weight - kgnot available

Weight - lbs.37

Weight - lbs.not available

Length - Meters6.13

Length - Meters10.9

Length - Feet2

Length - Feet36

Length - Inches1

Length - Inchesnot available

Length overall - Detail20 ft. 10 in. (6.13 m)

Length overall - Detail36 ft. 0 in. (10.9 m)

Length overall - Meters6.35

Length overall - Meters10.97

Length overall - Inches25

Length overall - Inches432

Engine and Drivetrain

Engine/s standardMercruiser 5.0 l Alpha 220 hp

Engine/s standardMTwin 5.0 L MPI Bravo III 520 php

Fuel tank capacity - Detail41 gal. (155 l)

Fuel tank capacity - Detail193 gal. (730 l)

Fuel tank capacity - Liters155.2

Fuel tank capacity - Liters730.58

Fuel tank capacity - Gal41

Fuel tank capacity - Gal193

Drive typeI/O

Drive typeInboard - Twin

Engine max320 hp

Engine max850 hp

Fuel typenot available

Fuel typeGas

Operational Info

Maximum capacity1,442 lbs. (654 kg)

Maximum capacitynot available

Maximum people1

Maximum peoplenot available

Crownline 21 Classic 2006 vs Crownline 340 CR 2007 — Common Questions

Which is the larger boat — the Crownline 21 Classic 2006 or the Crownline 340 CR 2007?

The Crownline 340 CR 2007 is the longer of the two at 36,0 feet overall. The Crownline 21 Classic 2006 comes in at 2,0 feet, making it roughly 34,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Which boat can handle a bigger outboard?

The Crownline 340 CR 2007 is rated to a maximum of 850 hp, giving it the larger power ceiling. The Crownline 21 Classic 2006 tops out at 320 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.

How many people can each boat hold?

The Crownline 21 Classic 2006 is Coast Guard rated for 1 passengers, while the Crownline 340 CR 2007 is certified for 10. 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 is wider, and does it affect trailering?

The Crownline 21 Classic 2006 measures 102" wide, compared to 14" for the Crownline 340 CR 2007. The US standard-width towing limit is 8’6" (102") in most states — anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.

Which boat has the larger fuel tank — the Crownline 21 Classic 2006 or the Crownline 340 CR 2007?

The Crownline 340 CR 2007 has the bigger tank at 193 gallons, versus 41 gallons on the Crownline 21 Classic 2006. That 152-gallon difference translates to roughly 456–760 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Are the Crownline 21 Classic 2006 and Crownline 340 CR 2007 from the same manufacturer?

Yes — both the Crownline 21 Classic 2006 and the Crownline 340 CR 2007 are built by Crownline. 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.

← Crownline 21 Classic 2006 full specs ← Crownline 340 CR 2007 full specs