BMW Z4 3.0i vs BMW 645Ci Cabrio
| Category | BMW 645Ci Cabrio | BMW Z4 3.0i |
|---|---|---|
| Engine layout | 4.4 l V8 | 3.0 l R6 |
| Max power (ps / bhp) | 333 / 329 | 231 / 228 |
| Max torque (Nm / lb-ft) | 450 / 332 | 300 / 221 |
| Curb weight (kg / lb) | 1947 / 4292 | 1401 / 3089 |
| Power / tonne (ps / bhp) | 171 / 169 | 165 / 163 |
| Average price | €90,000 | €40,000 |
Lap Times
| Track | BMW 645Ci Cabrio | BMW Z4 3.0i |
|---|---|---|
| Autozeitung test track | 1:48.40 | 1:47.40 |
| Hockenheim Short | 1:19.60 | 1:18.10 |
Acceleration
| Speed & distance | BMW 645Ci Cabrio | BMW Z4 3.0i |
|---|---|---|
| 0 - 40 kph | 1.8 s | 1.9 s |
| 0 - 60 kph | 3.2 s | 3.2 s |
| 0 - 80 kph | 4.7 s | 4.9 s |
| 0 - 100 kph | 6.1 s | 6.1 s |
| 0 - 120 kph | 8.8 s | 9.1 s |
| 0 - 140 kph | 11.8 s | 11.9 s |
| 0 - 160 kph | 15.0 s | 15.7 s |
| 0 - 180 kph | 19.2 s | 20.5 s |
| Est. 100 - 140 kph | 5.6 s | 5.5 s |
| 0 - 100 mph | 14.9 s | 14.5 s |
| Est. 1/8 mile | 10.0 s @ 83.3 mph | 10.4 s @ 82.6 mph |
General performance
| Category | BMW 645Ci Cabrio | BMW Z4 3.0i |
|---|---|---|
| Top speed | 250 kph (155 mph) | 252 kph (156 mph) |
| 18m slalom | 62.3 kph (38.7 mph) | 59.4 kph (36.9 mph) |
| Fuel economy | 12.8 l/100 km (18 mpg US / 22 UK) | 9.1 l/100 km (26 mpg US / 31 UK) |
| 100 kph - 0 | 37 m (122 ft) | 34 m (113 ft) |
Summary
| Category | BMW 645Ci Cabrio | BMW Z4 3.0i |
|---|---|---|
| Track Performance | 192 | 200 |
| Straight line speed | 1447 | 1606 |
| Total | 1639 | 1806 |
Verdict
Z4 3.0i is the fastest by a small margin.
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Acceleration graph
