Stealth
#2 · Intamin · Thorpe Park
Coaster Launches
Coasterpedia and Wikipedia say 0 to 128 mph in 3.5 seconds. The ride is closed. Six Flags retired it in November 2024.
Kingda Ka's launch time is 3.50 s, an official figure.

Launch time
3.50s
Former operating hydraulic launch at Six Flags Great Adventure, 0 to 128 mph in 3.5 seconds. Coasterpedia and Wikipedia both give that time. The ride is closed. A computed acceleration is not a separate figure. Wikipedia also says 0 to 128 mph (206 km/h) for the same 128 mph.
Quick answers
Kingda Ka's launch time is 3.50 s, an official figure.
Kingda Ka is labeled Official. Ratified by a governing body such as the FIA, World Athletics or Guinness World Records.
The figure cites Wikipedia, “Kingda Ka.”
Kingda Ka is 6th of 8 on Fastest Launches.
Mechanism
Kingda Ka launched from 0 to 128 mph in 3.5 seconds. Coasterpedia and Wikipedia give that time. Six Flags retired the ride in November 2024. The launch time is what counts. The ride is closed.

The launch reached 128 mph in 3.5 seconds, a higher speed than Stealth's 80 mph and a longer time than Do-Dodonpa's 1.56 seconds. What counts is the 3.5-second figure the two accounts say.
Six Flags retired Kingda Ka in November 2024. The number stays because it was the operating launch, and the status stays closed so the page does not describe a ride a visitor can board.
Provenance
Claimed, measured and official figures side by side, each with its source. The ranked figure is marked.
Former operating hydraulic launch at Six Flags Great Adventure, 0 to 128 mph in 3.5 seconds. Coasterpedia and Wikipedia both give that time. The ride is closed. A computed acceleration is not a separate figure. Wikipedia also says 0 to 128 mph (206 km/h) for the same 128 mph.
Coasterpedia says the same 0 to 128 mph in 3.5 seconds. The ride is retired.
Reference
Context
Wikipedia says Kingda Ka's hydraulic launch accelerated the train from 0 to 128 mph, 0 to 128 mph (206 km/h), in 3.5 seconds. Coasterpedia says the same 0 to 128 mph in 3.5 seconds. The figure is 3.5 seconds.
The ride is closed. A November 2024 news report says Six Flags retired Kingda Ka at Great Adventure. The clock ends at 128 mph. Average acceleration, including a g figure some pages compute, is not a separate figure.
Every report is read by a person, and corrections are dated on the page.