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Bryan
Hagerty Employee

Brother from another mother: 11 shared engine displacements

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...

161 REPLIES 161
Mikey8
Passenger

The 390 photo appears to me an AMC Rebek “Machine”

Djens
Passenger

How about the most dominant engine ever built and the basis for current engines used in nhra drag racing-Mopar 426 Hemi !

Millercycle
Passenger

A variation on this discussion:   I believe Ford/Lincoln/Mercury covered the 7-liter zone with at least six different V-8 engines, measuring 425, 426, 427, 428, 429, and 430 cubic inches.

McMinnow
New Driver

425 nailhead in 64 Buick Riviera.  With Super Turbine 400 three speed tranny it's a smooth grand touring car.

fotogmike
Pit Crew

340: Mopar and Buick

Mike_E_V
Intermediate Driver

300 cu in. 6 cyl Ford and 300 cu in. aluminum Buick V8. Both from the 60's.

goraidrs
Passenger

425ci Buick

Vettes4me
Passenger

454 Chevrolet ?

PTB
Passenger

406 Ford was one powerful engine.

409 Chevy also was a good package. Both came with tri-power!

 

Birduszippidus
Passenger

304: Studebaker and AMC

350: Chrysler B-engine 1958 only

301: Pontiac and Plymouth

265: SB Chevy and Pontiac

johnlangmaid
New Driver

'57 and '58 Dodge and Desoto 392 hemi, International Harvester 392, plus current Dodge 392 hemi (6.4L) "Apache"

IH 304 and AMC 304

Bonus Bonus to the 383-Mercury 383 "Marauder"

My IH shop manual has a million mile maintenance schedule in it with various overbores due to the extremely thick cylinder bores.

IH sourced AMC 401 and 232 I6 in mid 70's light lines.

 

Jonnyboy55
New Driver

Forgot the Chevy 454 and the 400 also used in Pontiac firebird