Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
7.0 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 27.5′, the Tanzer 105 tops out around 7.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √27.5′ LWL = 7.0 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
43.9%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
279
Moderate-heavy — carries provisions well, deliberate in light air.
Hull Speed
7.0kts
Pounds/Inch Immersion
7lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Tanzer 105 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
J/105
Hunter 34
Tartan 34 2
Islander 34 2
How It Compares
Side-by-side with the boats most often cross-shopped against the Tanzer 105.
| Tanzer 105 | Hunter 34 | Islander 34 2 | J/105 | Jeanneau 342 | Tartan 34 2 | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 34.4 | 34.4 | 34.3 | 34.5 | 34.5 | 34.4 |
| LWL | 27.5 | 28.3 | 28.0 | 30.0 | 29.5 | 28.8 |
| Beam | 11.5 | 11.6 | 11.0 | 11.0 | 11.8 | 11.0 |
| Displacement | 13 | 11 | 9 | 7 | 12 | 11 |
| Ballast | 5 | 5 | 3 | 3 | 4 | 4 |
| Sail Area | — | 567 | 545 | 600 | 570 | 538 |
| Performance | ||||||
| PHRF | — | 159 | 210 | 90 | — | 174 |
| SA/Disp | — | 17.5 | 19.3 | 24.1 | 16.8 | 17.5 |
| Bal/Disp | 43.9 | 42.3 | 39.1 | 44.9 | 35.1 | 40.0 |
| Comfort | — | 23.1 | 20.5 | 22.3 | 23.2 | 23.0 |
| Capsize | — | 2.04 | 2.07 | 1.66 | 2.04 | 1.97 |
| Hull Speed | — | 7.1 | 7.1 | 8.4 | 7.3 | 7.2 |