Home » Parts Bin Puzzle: What’s Under The Skin Of This Obscure Dutch Kit Car?

Parts Bin Puzzle: What’s Under The Skin Of This Obscure Dutch Kit Car?

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Welcome back to Parts Bin Puzzle, the Autopian challenge where we give you a vehicle and you figure out where its bits came from! This time, your challenge isn’t just to find what lights this, but what other car is under its sleek bespoke bodywork. What you’re looking at is a 2010 Heynsdyk 2500 SF. It’s an exceedingly rare Dutch kit car from a man who creatively reused existing vehicles to build something new.

Last week, we kicked off the series with the 2023 Newmar Essex, a luxury Class A motorhome with a beefy Cummins and decorated with real wood. We asked you to guess its headlights and taillights. Those of you who guessed eleventh-generation Toyota Corolla for the headlights and Nissan Titan for the taillights are correct! 

Today’s Parts Bin Puzzle is the creation of Ronald Heijnsdijk. In 2006, the mechanical engineer embarked on a quest to build his own sports car. An archived press release notes that Heijnsdijk’s inspirations include later designs by Ettore Bugatti and Franco Scaglione. Designing his vehicle took years, with the release saying that he formed the design by hand in steel. 

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Vidframe Min Bottom

[Author’s Note: I don’t recommend clicking on the links unless you want the mystery spoiled.]

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Talking about the design process, Heijnsdijk said:

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“Ultimately it is the passion for form that drives me. By working only with my hands the form arises from out the material itself. Through the years there have been car designs which I find are completely suited to the material used. Those are forms which move me and continually draw me back. That’s what I was looking for in my own sports car.”

That flashy design needed to ride on something, and Heijnsdijk decided to reuse parts from existing cars. The basis of his sports car is that of another sports car that is readily available used and described as “mature.” Talking with AutoWeek magazine, Heijnsdijk explained his reasoning for using existing used cars while touting its benefits:

“Our choice to use a [Redacted] as the basis for a new sports car is in line with the ‘Cradle to Cradle’ concept: don’t throw it away but reuse it. You can of course recycle a car. But the [Redacted] is so solidly built that you can also can easily extend the life cycle and we do that with the 2500SF, showing that a passion for beautiful cars can be combined very well with a healthy green view on reuse – even if the engine is slightly less clean than a modern one. no cars are sold purely on the basis of these arguments, but it is nice for the drink table.”

For what will be your only hints, Heijnsdijk says that the donor cars originally weighed around 2,645 pounds. But after his dramatic transformation, they weigh just 1,984 pounds. Oh, and the donor cars were also built in the 1980s.

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His company, Heijnsdijk Sportscars B.V., also didn’t change the powertrain. Thus, the resulting vehicles have a 2.5-liter four making [redacted] horsepower. A more powerful version has a 2.5-liter turbo four making 247 horsepower. With the more powerful engine, the 2500 SF accelerates to 60 mph in six seconds and races on to a limited top speed of 155 mph.

AutoWeek compared the Heynsdyk 2500 SF’s handling and engine characteristics to an Austin Healey. Heijnsdijk credits that British roadster-style drive to the 661-pound weight loss. The AutoWeek review continued, surprised that the engine’s exhaust note featured lots of pops on deceleration. The magazine felt like the 2500 SF, with its long gears and high torque, was a fine touring machine.

And of course, you got to experience it from behind the wheel of something that looks like this. 

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2500sf
Heijnsdijk Sportscars B.V.

Heijnsdijk Sportscars B.V. started selling them in 2010 and buyers were able to get theirs in two ways. If you wanted the company to do all of the work, the car was 36,995 euros, or about $48,000 at the average exchange rate for 2010. If that was too rich for your blood, Heijnsdijk gave you the option to build it as a kit. That brought the price down to between 22,000 and 25,000 euros, or about $29,000 and $33,000, respectively.

AutoWeek also detailed the build process. It started by taking a donor car and assessing its condition. If it wasn’t too rotted out, the drivetrain was removed and the body was chopped down to the floor. The chopped up chassis then got rolled into the shop, the new body mounted on top, and the drivetrain installed. The cars were then finished out with mounting the lights, grille, and other pieces.

In the end, these cars were made for just two years. Production ended when Heijnsdijk Sportscars B.V. went bankrupt in 2012. Heijnsdijk expected to sell 30 to 50 of his sports cars a year, but by the time the business closed up shop just 17 and a partly-finished prototype were built. These cars occasionally show up for sale, and it’s pretty amazing to think about what’s under the skin.

Your Challenge

Speaking of which, what do you think Heijnsdijk used as a donor car? Oh heck, I’ll give you another hint. In 2010, Heijnsdijk said that there were 30,000 of these still on the road, making for a large pool of donors.

And of course, we’re going to have you guess these lights! Here’s the front:

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Here’s the rear:

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After you take your guesses, click here to reveal what part bins Heijnsdijk got his parts from. You may be wondering why I didn’t feature an interior photo, and that’s because that gives the donor car away. Click here to take a peek inside. And that’s a wrap for this Parts Bin Puzzle! Do you want to torture your fellow readers with a parts bin mystery? If you know of a vehicle using parts from other vehicles, we’d love to see them!

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m3convertible
m3convertible
2 years ago

As far as I can tell, headlamps are R50 mini as are the turn signals/driving lights. Taillamps appear to be from an Alfa 159 sedan. Car is based on a 944 for sure.

365daytonafan
365daytonafan
2 years ago

Headlights look to be from an R50 generation Mini. First thought for the engine was Subaru but seeing the comments above the Porsche 944 makes sense. The wheels look to be from the Boxster/ 996 era Porsches but they would fit on 944 hubs but would need spacers to get the offset right.

Sundance
Sundance
2 years ago

Heijnsdijk says: Ultimately it is the passion for form that drives me.

I say: You do not have any talent for designing a car.

NotSpanky
NotSpanky
2 years ago

Without being a Porsche afficionado, figured the BMW and Mercedes options didn’t fit era and quantities mentioned and Miata/MX5 too far the other way. And French/Italian options at the time unlikely. So kind of got to 944 by default.

Pretty certain headlights are from the early Mini reboot, maybe 2005? Not sure if that specific style was the default or one of JCW/aftermarket options, but sure I’ve seen that internal arrangement on an early one.

Taillights… No idea.

Bigdawg1124
Bigdawg1124
2 years ago

The wheels gave away that it was Porsche. So I guessed booster. Kept read and that changed to 944/928 so I was close.

No clue on the headlights and I thought s2k tails, but I was wrong there too lol

Bigdawg1124
Bigdawg1124
2 years ago
Reply to  Bigdawg1124

Boxster *

Grrr autocorrect

beachbumberry
beachbumberry
2 years ago

I’m jumping in the bandwagon. Porsche 944 based. 100% r50 mini headlights. Taillights are interesting and nice but I’m not sure what from.

V8 Fairmont Longroof
V8 Fairmont Longroof
2 years ago

Morgan? Maybe a bit heavy…. second guess Audi TT?

mnc
mnc
2 years ago

Porsche 944 based because of the 2.5liter engine. Alfa Romeo 159 rearlights, just the outside bits. Mini frontlights maybe?

mnc
mnc
2 years ago
Reply to  mnc

The blinkers are from a R53 Mini, but the frontlights are a mistery to me.

outofstep
outofstep
2 years ago

I only got the chassis right. At least this thing is prettier than the Carmen.

archimus
archimus
2 years ago

I got the chassis and the headlight pretty quickly, but that tail light was a doozy. It was especially difficult because the donor tail light comes to a sharp point at the lower inside corner but the Heynsdyk’s bodywork at that corner is rounded, meaning that the sharp corner of the light must be somehow shoved under the round corner. Not that it would have helped me – I was certain it was an s2000 tail light.

Black_Peter
Black_Peter
2 years ago

Are those headlights sideways?

TomMetcalf
TomMetcalf
2 years ago

I have heard that this car was specifically designed to be driven by somebody wearing wooden shoes. Please confirm if this is true?

Maymar
Maymar
2 years ago

I was initially thinking 986 based on the 2.5, but the 247hp turbo and of the 80’s made it pretty clear it was more front-engined. For some reason, 30,000 of them left on the road seems low. Mini headlights I think, but no clue on the tails.

Dalton
Dalton
2 years ago

The body of this is a weird blend of TVR, Aston, and that weird Weissmann thing Top Gear reviewed, i love it

automotiveflux
automotiveflux
2 years ago

I was originally going to say Porsche Boxster due to the wheels and roll bar but then i saw the part about the 1980s

RadBarchetta
RadBarchetta
2 years ago
Reply to  automotiveflux

Yeah that totally threw me as well. Thought I had it figured out until that point.

sandshadow
sandshadow
2 years ago
Reply to  automotiveflux

I think the engine is at the wrong end for the Boxster. The Boxter has radiators at the front but that would have been a substantial modification of the underlying car to create a central radiator like that.

Your mention of Porsche did get me thinking about 924 and 944. Wikipedia says the 924 had the 2.5L at the end of its life but I think this has to be built on the 944.

v10omous
v10omous
2 years ago

Had the right manufacturer, but the wrong model. I got hung up on the convertible body style (and was honestly unaware the correct answer even came as a convertible). Lights I just cheated on because I didn’t have a clue.

Floridabrit
Floridabrit
2 years ago

Dear Autopian

The last five posts have been 4 truly hideous cars and one French Fisticuffs. Can we please have something nice in the next one?

Dalton
Dalton
2 years ago

Porsche 944 is my best guess?

sandshadow
sandshadow
2 years ago
Reply to  Dalton

Agree – front-engine, 2.5L, 1980s, 30k+ left on the road all makes the 944 my choice as well.

Black_Peter
Black_Peter
2 years ago
Reply to  Dalton

That explains the wheels!

Tacofan
Tacofan
2 years ago

The wheels give away the chassis since you often don’t mix an OEM wheel on a different brands chassis. Having said that, the taillights remind me of a chopped s2000 tail light. I’ve got nothing for the headlights and I don’t know what model the chassis is from but I would guess one of the front engine models.

Andrew
Andrew
2 years ago
Reply to  Tacofan

Yeah. I thought the rears were s2000 tailights as well, but alas they don’t match.

For the headlights, I have no idea, but I was thinking maybe an Alfa type.

InWayOverMyHead
InWayOverMyHead
2 years ago

This thing would be a hoot. I peeked. Knocking 700 lbs off that donor car would make for an absolute beast in the twisties. I’ll leave it there, no spoilers.

andyindividual
andyindividual
2 years ago

I’m stumped and I don’t want to cheat.

I do want to say however, that this thing is uuuuuugleeee.

The passenger door and hood alignment screams hack built

DoctorNine
DoctorNine
2 years ago
Reply to  andyindividual

It’s design choices remind me of the feminine ideal of Robert Crumb. Clearly heartfelt, but inexplicable.

FrankenCamry
FrankenCamry
2 years ago

My initial reaction on the headlights was “whichever parts bin Panoz pulled them from for the Esperante”, but after seeing additional pictures, not so much.

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