BMW S58 RSS

S58 vs M177 — Two Engines, One Market Segment Comparing a 3.0-liter inline-six to a 4.0-liter V8 sounds like comparing apples to oranges. But in the real world, the BMW S58 and Mercedes-AMG M177 compete directly: M3 vs C63, M4 vs C63 Coupe, M2 vs CLA 45 AMG. They sit in the same showroom price range, target the same buyer, and both respond exceptionally well to ECU tuning. This engine-to-engine comparison breaks down which architecture tunes better, costs less to modify, and holds up longer under increased power. Comparison Table: S58 vs M177 Spec BMW S58 3.0T I6 Mercedes-AMG M177...