Brother from another mother: 11 shared engine displacements

[Bryan]

Today it’s common to find engines from several manufacturers that share displacement figures. Engineers determined that 500 cc per cylinder is a sweet spot for efficiency with low emissions and, consequently, there are lots of 2.0-liter four-cylinders, 3.0-liter sixes, and 4.0-liter V-8s. Before that discovery, road taxes in some countries also influenced displacement. Plenty of manufacturers ended up with engines designed to fit under certain mandated thresholds. Read the full article on Hagerty.com:

https://www.hagerty.com/media/automotive-history/brother-from-another-mother-11-shared-engine-displa...

[50caddy]

Cadillac engines were 390’s from 1959-63.  The ‘63 was a brand new engine which evolved into the 429, 472 and 500 cubic inch displacement engines.  

[60Caddy]

Lets not forget 1951 Chrysler 331 hemi and Caddy's first overhead Valve V8 also at 331 cubic inch introduced in

1949

[Gusto]

How about 318 and 429?

[Dopper44]

Chrysler had a 350 cubic inch motor called the Golden Commando or Sonoramic Commando in the 1958, topped with dual carbs. An example of the motor - watch John Carpenter's cinema adaptation of Stephen King's Christine. The '58 Fury had the aforementioned Golden Commando.

[joetunick]

260: Ford and late Olds

289: Ford and Studebaker

322: Buick and LaSalle

429: Ford and Cadillac

[Ron]

ACK! Ask any Studebaker owner how many times they have been told that their V8 was a Ford 289.... not even close to the same engine and Studebaker had it first!

[DonKeefe]

And don't forget the 425 Buick, Olds and Cadillac V-8s. 

[DS23456]

Ford's V8 289!  HO version was a beast if tuned right. 

[Volvoguy]

Ford also had a 429 that was in my '68 Country Squire  Mercury had a 360 and a 383

[NSXter]

Studebaker shared  289 CI  with Ford

[NSXter]

289 CI was shared by Studebaker as well as ford

[Studey4ever]

I own a Studebaker Lark and a Studebaker Avanti.  When I'm asked the displacement of the cars' respective motors and respond "289," most people think I'm running a transplanted Ford engine.  I always explain, "No Studebaker made this motor, you can't copyright or trademark cubic inch displacement number."

[joetunick]

303: Plymouth ('56) and Olds ('49)

326: Pontiac and Plymouth (59 only)

383: Mopar and Mercury/Edsel

425: Buick and Olds

[Mantis]

425 also in the late seventies Cadillacs 

[GEORGEG]

You missed 289 Stude and Ford and 292 Ford and Chev and that is only going back to the 60's 

[moparforever]

your forgot 351 modified

[GEORGEG]

You missed 289 Studebaker and Ford   292 Chev 6 (truck) and Ford  

[jpsteele]

348-409

[Cornbinder]

International and Mopar also had different 392's.  In Cornbinders, it was optional in pickups from 1969 until the end of the Light Line in 1975, although they also used the AMC 401 intermittently circa 1973-74.  As for Chrysler products, it was the biggest displacement for the original Hemi in the 1950's.

Then there's the Ford and Studebaker 289's - completely different engines. 

[nh911sc]

you left our the 1959 Cadillac 390

[Jagcarguy]

I believe Packard also had a 327 straight 8 flathead

[cslandry]

Pontiac 400, which was a bored 389, which was a stroked 369

[BillyBob]

Disappointed that Studebaker's 289 was omitted from list!  Often at car shows, I'm told the 289 in my '63 R1 Studebaker Avanti is a Ford motor.  Then, the insults continue...Avanti was a Kit Car (never), Avantis were made in Canada (never), Avantis were designed & made in Europe (never).  Avanti & Avanti II were made in South Bend, later Avanti IIs & Avantis were made near Youngstown, Avantis were made in Georgia, Avantis were made in Cancun, Mexico.

[WDHaskins]

Missed the Ford 289 and the Studebaker/Packard 289.  Latter with a supercharger

[BeavHawk]

Pontiac 400? Ubiquitous in 67-78 (including some 79's) Poncho muscle including in HO, RamAir (II,III,IV,V), etc. across F, A, bodies as well as the bigger platforms like Bonneville, Catalina, etc. 

[MoparJoe]

Mopar had a 350 in 58' as one of their big block offerings

[pcanavin]

Great article.   Thanks for remembering my AMC products even the obscure 327.   

[kirkbrit]

401 was, I believe first, a Ford offering.   Not even mentioned?

[Brandan]

Maybe you're thinking of the 410?

[fbwilliams69]

There were Ford 401 (6.6 L) diesels and Ford 401 tractor engines. Were you thinking of the 406?

[BillHanlon]

As long as you are letting in truck engines, the 50s GMC 302 six cylinder was a popular swap into early 50s Chevy cars.

[daddyo]

I don't recall ever seeing a Chevy street car running a GMC 6 but I do remember that the dirt track stock cars would swap out their Chev 6 for a GMC 6 to help them compete with the Ford V8s.   What I don't recall was whether this was a legal swap - not that it mattered much in those days !

[turbobill]

170, Ford inline 6 and a Chrysler slant 6

198, Buick V6 and Chrysler slant 6

200, Ford inline 6 and a Chevy V6

215, Buick and Olds aluminum V8 and a 3.75 inch bore Chevy six sold only by Pontiac

225, Buick V6, Chrysler slant 6

230, Chevy 6 and Jeep Tornado 6

250, Chevy 6, Rambler V8, Cadillac V8 HT4100), and a Ford inline 6

258, AMC 6 and Jaguar 6

267, Chevy V8 and Cadillac V8

300, Buick V8 and a Ford 6

304, AMC and International

305, Chevy and GMC big block V6

307, Chevy and Oldsmobile

315, Chrysler and Ford voodoo

325, Chrysler and Chevy (5.3)

330, Oldsmobile, Ford truck (FT), Ford modular

340, Buick and Chrysler

360, Ford truck (FE)

368, Lincoln Y block and Cadillac

390, Cadillac

392, Chrysler and International

401, GMC big block V6, International V8 and Ford truck (Super Duty)

410, MEL and FE. Both the same manufacture but two completely different engine families.

413, Chrysler and the Ford V10

425, Buick nailhead, Oldsmobile tall deck and Cadillac ('77-'79)

429, Cadillac and Ford

430, Buick and Ford MEL

440, Chrysler and a White V8 truck engine in the '50's

478, GMC V6 and International V8

[Electricman]

You missed 428 Pontiac and Ford

[Glen]

390 Ford

[drewr13NJ]

Finally, some one remembered International 304/AMC 304!

[turbobill]

Electricman,

The article mentioned those two.

[Brad]

I got beat to the comments about the Ford & Studebaker 289. Ford also had a 221 V8 in production just prior to the 260/289 era, which was coincidentally the same cubic inches as the original Ford Flathead first produced back in the early 1930's. Different architecture, same cubic inches. That probably doesn't count, but there you go. 

[Figuero]

Chevrolet the "Standard Bearer" for the 383 displacement engine?  Because they never made one? What?

[Brandan]

Google "383 engine" or "383 rotating assembly" and the majority of the search results you'll get will be for a Chevy small-block, not a Mopar big-block. Every hot-rodding magazine in the '80s, '90s, and early '00s featured small-block Chevy stroker builds. 

[Robles]

What about the 400 motors in the GTO and Firebird?

[Jamin65malibu]

What about the 283 small block chevy I have one in my 65 malibu chevelle it runs strong and I heard about a head swap somewhere and they were getting some big numbers from it.

[Buickgs1]

The 425 was actually the largest Buick "Nailhead" ...

[Brandan]

Yes, it was the largest GM allowed in the A-body.

[red-on-red]

I'm pretty sure Studebaker and Ford both made a 289 CID V8

[oldmustangs49]

GMC also had a 302 - a 6 cylinder.

Ford had the 221 V8 from 1962-1963 and in Flathead form from 1932 & later.

[dooscoop32]

Your article states the 401 was the largest size of Buick Nailhead engine.  This is incorrect.  In 1965 and 66 the final year for the nailhead, a 425 CI version was available.  

Which brings up another displacement match.  Oldsmobile also had a 425 CI V8 from 1965 thru 67.

[dooscoop32]

430 was shared by Ford and Buick.

[dooscoop32]

303 was shared by Oldsmobile and Pontiac.  The latter was the displacement Pontiac made for the actual race cars they ran in Trans Am racing in 1969 due to the 305 CI 5-Liter limit.  It was not in the production cars.