Car and Driver has tested both the ZL1 and GT500. While C/D tested with their drivers on the ZL1, SVT only allowed C/D to ride shotgun in the GT500. Here are the results of both tests. Keep in mind that the GT500 had a passenger in the tests, while the ZL1 did not. So the curb weight is pretty close in the testing. No road course testing was done.
ZL1
Curb Weight: 4120
Base Price: $56,295
Engine: 6.2L 580 hp, 562tq
0-60: 4.1
1/4 mile: 12.3 seconds
Top Speed (Claimed): 180
MPG: 13
GT500
Curb Weight: 3850
Base Price: $59,000
Engine: 5.8L 650 hp, 600tq
0-60: 3.7
1/4 mile: 11.7 seconds
Top Speed (Claimed): 202
MPG: 15
ZL1
Curb Weight: 4120
Base Price: $56,295
Engine: 6.2L 580 hp, 562tq
0-60: 4.1
1/4 mile: 12.3 seconds
Top Speed (Claimed): 180
MPG: 13
GT500
Curb Weight: 3850
Base Price: $59,000
Engine: 5.8L 650 hp, 600tq
0-60: 3.7
1/4 mile: 11.7 seconds
Top Speed (Claimed): 202
MPG: 15
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