Which would you buy?

[AG4]

How much does GM need to make 260hp? 3.8L and a supercharger. That same engine will only make 200 horses N/A. This is OVER TEN YEARS LATER, and they still can't make a displacement-efficient engine.

GM has replaced the supercharged 3800 V6 engine in most mid-size/large models with the smaller naturally-aspirated 3.6 liter DOHC V6 or the larger 303hp 5.3 liter V8.
The $24,330 Pontiac Grand Prix GT is the last GM car I know with a supercharged 3800 V6.

GM also has newer naturally-aspirated engines...
DOHC 3.6 liter V6 that produces 240hp or 255hp (dependeing on the car model)
Other newer GM engines:
240hp LZ8/ LZ9 3900 V6
224hp LZ4 3500 V6 (base '07 Saturn Aura)
210hp 2.8 liter DOHC V6
171hp 2.4 liter DOHC inline-4

Their 5.3L engine only makes a measly 303 hp. BMW can make 30 more with a 3.2L engine (the current M3 engine).

Comparing Chevy & Pontiac's 303hp 5.3 liter V8 to the more expensive high performance BMW M3?
Check out Cadillac, their 4.6 liter DOHC Northstar produces 320hp and their supercharged 4.4 liter Northstar produces 469hp.

High output small displacement engines with low torque aren't really ideal for large cars.