Facts and figures
| Vauxhall Cascada | Audi RS5 Cabriolet | VW Beetle Cabriolet 1.4 TSI 60s | BMW Z4 sDrive 18i | |
| On-the-road price/total as tested | £23,995/£25,980 | £68,985/£76,420 | £26,115/£26,695 | £27,610/£32,700 |
| Residual value (after 3yrs/30,000) | £10,414/43.4% | £31,802/46.1% | £12,431/47.6% | £14,719/53.3% |
| Depreciation | £13,581 | £37,183 | £13,684 | £12,896 |
| Annual tax liability std/higher rate | £1,000/£1,999 | £4,766/£9,533 | £1,190/£2,381 | £1,260/£2,519 |
| Annual fuel cost (12k/20k miles) | £2,163/£3,605 | £3,692/£6,153 | £2,583/£4,305 | £2,321/£3,868 |
| Ins. group/quote/road tax band/cost | 20/£385/F/£140 | 47/£800/L/£475 | 23/£397/G/£175 | 34/£431/G/£175 |
| Cost of 1st/2nd/3rd service | TBA | £42 a month (3yrs) | £395 (3yrs/30k) | £425 (5yrs/50k) |
| Length/wheelbase | 4,696/2,695mm | 4,649/2,751mm | 4,278/2,540mm | 4,239/2,496mm |
| Height/width | 1,443/1,839mm | 1,380/1,860mm | 1,473/1,808mm | 1,291/1,790mm |
| Engine | 4cyl in-line/1,364cc | V8/4,163cc | 4cyl in-line/1,390cc | 4cyl in-line/1,997cc |
| Peak power | 138/4,900 bhp/rpm | 444/8,250 bhp/rpm | 158/5,800 bhp/rpm | 154/5,000 bhp/rpm |
| Peak torque | 200/1,850 Nm/rpm | 430/4,000 Nm/rpm | 240/4,500Nm/rpm | 240/1,250 Nm/rpm |
| Transmission | 6-spd man/fwd | 7-spd S tronic/4wd | 6-spd man/fwd | 6-spd man/rwd |
| Fuel tank capacity/spare wheel | 56 litres/sealant | 61 litres/sealant | 55 litres/space saver | 55 litres/run-flat |
| Boot capacity (seats up/down) | 380/750 litres | 380/750 litres | 225 litres/N/A | 310 litres/N/A |
| Kerbweight/payload/towing weight | 1,626/484/1,250kg | 1,920/50kg/N/A | 1,454/451kg/N/A | 1,395/330kg/N/A |
| Turning circle/drag coefficient | 11.8 metres/N/A | 11.6 metres/0.34Cd | 10.8 metres/0.38Cd | 10.7metres/0.34Cd |
| Basic warranty (miles)/recovery | 3yrs (60,000)/1yr | 3yrs (60,000)/3yrs | 3yrs (60,000)/3yrs | 3yrs (untld)/3yrs |
| Service intervals/UK dealers | 20k miles (1yr)/404 | Variable/121 | Variable/223 | Variable/153 |
| Driver Power manufacturer/dealer pos. | 26th/9th^ | 10th/18th^ | 16th/25th^ | 15th/16th^ |
| Euro NCAP: Adult/child/ped./stars | N/A | N/A | N/A | N/A |
| 0-60/30-70mph | 10.6/10.1 secs | 4.6/4.1 secs | 8.4/9.2 secs | 7.9/8.1 secs |
| 30-50mph in 3rd/4th | 5.1/7.7 secs | 3.0/4.2 secs | 4.5/5.8 secs | 4.1/5.7 secs |
| 50-70mph in 5th/6th/7th | 10.0/12.3 secs/N/A | 5.7/7.4/11.1 secs | 8.2/10.3 secs/N/A | 7.6/9.9 secs/N/A |
| Top speed/rpm at 70mph | 129mph/2,600rpm | 155mph/2,400rpm | 129mph/2,500rpm | 137mph/2,400rpm |
| Braking 70-0/60-0/30-0mph | 50.4/37.6/8.8m | 45.4/32.9/8.5m | 50.3/39.5/9.4m | 46.2/34.5/8.6m |
| Noise levels outside/idle/30/70mph | 62/44/64/71dB | 69/52/63/69dB | 60/46/62/69dB | 63/47/68/74dB |
| Auto Express econ. (mpg/mpl)/range | 33.8/7.4/416 miles | 19.8/4.3/266 miles | 28.3/6.2/342 miles | 31.5/6.9/381 miles |
| Govt urban/extra-urban/combined | 36.2/52.3/44.8mpg | 19.3/33.2/26.4mpg | 32.1/50.4/41.5mpg | 31.7/50.4/41.5mpg |
| Govt urban/extra-urban/combined | 8.0/11.5/9.9mpl | 4.2/7.3/5.8mpl | 7.1/11.1/9.1mpl | 7.0/11.1/9.1mpl |
| Actual/claimed CO2/tax bracket | 193/148g/km/21% | 330/249g/km/35% | 231/158g/km/23% | 207/159g/km/23% |
| Airbags/Isofix/rear parking sensors | Four/yes/yes | Four/yes/yes | Four/yes/yes | Four/yes/£620 |
| Auto box/stability/cruise control | No/yes/yes | Yes/yes/yes | No/yes/yes | £1,845/yes/£255 |
| Climate ctrl/leather/heated seats | £715/£1,050/£345** | Yes/yes/£300 | Yes/yes/yes | £455/part/£295 |
| Met paint/xenons/wind deflector | £525/£790/£255 | £615/yes/yes | No/£710/£275 | £530/yes/£215 |
| Sat-nav/USB connection/Bluetooth | £855/yes/£220 | Yes/yes/yes | £305/yes/yes | £2,165/yes/yes |
