Mercury V10 400hp SeaPro vs Ilmor MV8 430 (LT-Based)
V10 400hp SeaPro
MV8 430 (LT-Based)
| Spec | Mercury V10 400hp SeaPro | Ilmor MV8 430 (LT-Based) |
|---|---|---|
| Power & Performance | ||
| Horsepower | 400 HP | 430 HP |
| Displacement | 5700 cc | 6200 cc ← |
| Configuration | 10 Cyl / V10 64° Naturally Aspirated | 8 Cyl / V8 (90°) |
| Weights & Dimensions | ||
| Dry Weight | 316 kg (697 lbs) ← | 320 kg (706 lbs) |
| Mechanical & Electrical | ||
| Gear Ratio | 2.08:1 | 1.75 |
| Alternator | 1890 W ← | 1197 W |
| Fuel Delivery | EFI | EFI |
| Maintenance | ||
| Spark Plug | NGK LKAR7C-9 | ACDelco 41-114 |
| Engine Oil | Mercury 10W-30 SeaPro | 15W-50 Synthetic |
Technical Comparison Analysis
Power & Displacement
Comparing the Mercury V10 400hp SeaPro and Ilmor MV8 430 (LT-Based) shows a displacement difference of 500cc. 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 Mercury is the lighter option at 316kg, offering a weight saving of 4kg 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 Mercury offers the best charging performance with a 1890W 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.