Siku is a German manufacturer of scale model toys, including diecast vehicles.  By the early 80's the cars were made 1:55 scale and were mostly all-metal.  The cars to focus on are the ones from the 1980's with the whitewall/deep dish tires.  See image.  These wheels react really well to graphite, and combined with the larger scale size and nice weight, make the cars really fast.  Some of these cars though don't fit on the standard orange track, so I'll call out the models that are too wide.

Siku buying warnings;

• Important if you're purchasing these loose, is to avoid any with rust on the wheels.  Need the wheels to be free.
• There are similar looking wheels that have the whitewalls, but are not deep dish (aka flat).  These are not as good.

The whitewall/deep dish wheels is the distinguishing factor

Below you'll find my latest Siku rankings.  I have 34 different models, but there are many more to acquire and a few I would like to upgrade, so this list will evolve.  

Key notes/considerations:

• I race on a two-lane, 27 foot Derby Magic track (equivalent to about one-third of a mile).  The Derby track is 22% wider than a typical Hot Wheels orange track, allowing me to race some of the wider Siku castings. 
• I categorize my cars into speed tiers with 5-Stars being the best. The 5-star performers all have times under 2.500 seconds. 
• I've applied graphite to the cars, which really brings out the speed of the Siku cars.

​Please see information on the home page for more details on testing method, speed tiers, etc.

See the Siku Inventory page for details on call the cars with the whitewall/deep dish wheels.

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My top 5 Siku cars.  All 5-stars.  The Mercedes 260E Ambulance, Porsche 928, Mercedes 208 van, Nissan 300 ZX and the Jaguar XJ6.  Note that the Porsche 928 and Jaguar XJ6 do not fit on a standard orange track. 

Siku cars ranked 6 to 10.  Peugeot 505 STI, Ferrari 288 GTO, Mercedes Benz 500 SE, Chevy Corvette, and Mercedes Benz 190E.  The first four are 5-Star cars and the last won a 4-Star car.  Note that the Ferrari does not fit on a standard orange track.  

Siku cars ranked 11 to 15..  Opel Kadett SR, VW Pickup/Caddy, Opel Senator SR, Porsche 911 Turbo and the green Audi 200 ST.
Note that the Porsche 911 Turbo does not fit on a standard orange track.

Fastest Siku Cars 

Observations:

• Some great speed with this series with 9 cars classified as 5-star performers and 7 cars at 4-stars.  The Mercedes 260E Ambulance is tied as my 5th fastest overall car.
• Recent pickups in 2025 include the Mercedes Benz 500 SE, the Audi 200 ST, the Ford Escort GL and the Matra Simca Rancho.
• All the cars are ranked, so no average or slow models so far.  That is very impressive.
• All of these cars have a metal base, with the exception of the BMW 633 CSI.  Still, that car was pretty quick regardless.

​See the Siku Inventory page for a listing of the cars with whitewall/deep dish wheels.