Why does the more expensive AMG GT-S have the less powerful 4.0L V8 (same as C63 AMG) instead of the more powerful 5.5L V8 (used by AMGs E63, CLS63, and S63)?

It seems widely touted as an excellent high-performance car and MSRPs at a not very small $130,000 (usd.) Meanwhile, the C63 AMG shares the same engine and MSRPs at $63,000 which is half that.

Other vehicles will get you a lot more car and you get the bigger engine: The E63 AMG MSRP is $101,000. CLS63 AMG is $103,000. However, understandably, the big boy S63 AMG MSRP is $151,000. But not understandable is why the $130,000 AMG GT-S got the engine used by the C63 AMG at half the price.

Why not give it the 5.5L with 577hp and 590lb-ft of torque instead of the 4.0L with 503hp and 479lb-ft of torque which it has?

submitted by K3R3G3
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