Yamaha XTO Offshore 450 V8 vs Ilmor MV8 430 (LT-Based)
XTO Offshore 450 V8
MV8 430 (LT-Based)
| Spec | Yamaha XTO Offshore 450 V8 | Ilmor MV8 430 (LT-Based) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 450 HP | 430 HP |
| Displacement | 5559 cc | 6200 cc ← |
| Configuration | 8 Cyl / V8 60° | 8 Cyl / V8 (90°) |
| Weights & Dimensions | ||
| Dry Weight | 437 kg (964 lbs) | 320 kg (706 lbs) ← |
| Mechanical & Electrical | ||
| Gear Ratio | 1.79:1 | 1.75 |
| Alternator | 1224 W ← | 1197 W |
| Fuel Delivery | Direct Injection | EFI |
| Maintenance | ||
| Spark Plug | NGK ILFR6G-E | ACDelco 41-114 |
| Engine Oil | 5W-30 FC-W (Full Synth) | 15W-50 Synthetic |
Technical Comparison Analysis
Power & Displacement
Comparing the Yamaha XTO Offshore 450 V8 and Ilmor MV8 430 (LT-Based) shows a displacement difference of 641cc. The Ilmor features a larger 6200cc block, which typically provides superior low-end torque and better hole-shot performance when pushing heavy loads or reaching planning speeds.
Weight & Rigging
In terms of transom weight, the Ilmor is the lighter option at 320kg, offering a weight saving of 117kg over its competitor. This weight reduction is critical for smaller hulls or boats with limited transom capacity where every kilogram affects the center of gravity and drainage efficiency.
Electrical & Features
For boats equipped with modern electronics, sonar, and shallow-water anchors, the Yamaha offers the best charging performance with a 1224W alternator. Choosing the right power-to-weight profile between these two 4-stroke engines depends heavily on your specific boat's displacement and daily power requirements.