17th May 2002, 16:47

I would rather have the chevy 305 any day of the week. don't get me wrong, I like the olds 307, but in the cars I have driven the 305 accelerates better.

15th Mar 2003, 17:55

The 307 and the 305 engines are both good engines. The 305 had big improvements on leaking problems starting in 1986. The 305 has 30 more horsepower. But I like the Buicks best and the 307 Olds engine is in those.

25th Apr 2003, 10:26

There isn't much difference power wise between the early 80's 305 Chevy or 307 Olds, but for the most part, in regular cars, the 307 Olds came with more torque than the 305 Chevy, just look in a Chiltons manual.

The 305 has a smaller bore, but a longer stroke than the 307, making the 307 better at higher RPMs. 307's can be made to perform well, especially with a good set of early 70's 350 old heads. Making an honest 250hp 307 Olds would cost about the same as making the power in a 305, but a 307 will likely last longer (less stroke = less piston speed and friction).

Oldsmobile RWD cars (Cutlass, etc) didn't come with a Chevy 8cyl engine after 1979 in the US, but likely did in Canada or Mexico.

If you have a car with the 307 in it, keep it and do a basic rebuild, and you'll be just as happy with it as you would be with a 305 Chevy.


11th Oct 2003, 17:53

307's are very tough engines. 20 years, around 300,000km, and still not burning a drop of oil. They need a bit more power, but that can be achieved by a different cam, dual exhaust, etc. Nice engines.

Jake Wiebe, Ontario Canada

26th Feb 2004, 15:40

The above comment must be from one of those doods the review writer warned about, who buy a beat-up Cutlass cheap, make some minor "improvements" and then claim it's worth $5000...

1st Mar 2004, 13:23

I own a 1984 Cutlass Supreme Brougham. I bought it 4 years ago. I love the car and it is great on the highway. Great fuel economy and an excellent ride. I would suggest one of these cars to anyone. The are fast fun and enjoyable. My car has the 305 and has had a bunch of body work done to it because it sat for a few years and had some rust. They are a lot better than the cars that are made now in the respect that they are sharp looking (not just a bubble) and they ride as smooth as glass. My friends all tell me that they wish they could find something like it.

Brock Rutledge

Saskatchewan, Canada.

19th Nov 2006, 09:55

Is there a difference in the motor mounts from the 307 to 305.

17th Jan 2007, 08:34

I recently received a 1984 Oldsmobile Cutlass Supreme for Christmas. It only has 5,912 original miles on it! It was kept in a garage for most of it's life, and is in excellent condition. It was bought from a lady, who inherited it from her uncle that used it as a Sunday drive car. I am in the process of replacing all hoses and belts, due to the fact it has not been driven in five years. the only physical damage, are the two minor dings in the drivers side door from a shopping cart. I dream of one day building the engine up and taking it to car shows in a year or two. At 18 years old and I am looking forward to spending a long time with my new Oldsmobile.

Finally I bet you are wondering how much my family acquired this fine machine for? Try $650, and she even threw in some extra parts for it that were laying around in the garage (fuel filters and whatnot). This is a true treasure.

15th Mar 2007, 19:24

I'm the proud owner of a 84 cutlass supreme brougham. It's my second cutlass and I have a feeling it won't be my last. They just don't make them like this anymore in my eyes they are a true classic.

16th Mar 2007, 21:24

Drop a Chevy 350 in your cutlass I just dropped one in my 82 again and it screams.

11th Feb 2008, 18:32

To the 18 year old who plans to spend many years with the car... be carfeul! I got a Cutlass Supreme 305 for my first car and wrapped it around a van 2 weeks later. it's a beautiful fun car, but it's faster than you think...

12th Mar 2008, 13:31

I just purchased an 86 Cutlass super clean 1500. It runs like a dream.

30th Mar 2008, 00:07

Hi there, I just bought a 83 cutlass supreme has a project car, and just found out that the car need a new chassie. If anyone know's where I can find one, or any information about getting a new one built. Please let me know


30th Nov 2008, 19:05

I've got a 84 Cutlass. Where can I get early 70 350 Olds heads for a 307 A5?

15th Mar 2009, 00:06

I bought a 1984 4 door Cutlass Brougham off my friend Jeff, and wow this car is incredible! It runs awesome, it's so much fun to drive.

My other car is a 2000 Sunfire and it's no where near as fun to drive. The Cutlass is like riding on a cloud.

I fell in love with this car, not to mention I got brand new tires and centre line rims for 120!!! :D And I'm getting brand new header's for it next week for 100! And chrome valve covers for $20, they're brand new too :)

This car is cheap to do up. My Sunfire cost me 12k :( I LOVE MY CUTLASS MORE!

10th May 2009, 21:41

I have a 87 cutty that I bought for 2100 bucks that has just over 200,000km and it purrs, it had a little bit of surface rust so I figured I would repaint the whole thing because it had to be done anyways, I sanded er down and painted it gloss red, it looks sharp with the white vinyl top, I plan to throw duel exhaust on er soon..

17th Dec 2009, 13:42

I bought an 86 Cutlass Supreme for 600 from a car auction. This car is the best car I ever drove, it has a 307 V8 with automatic transmission. The car didn't have a battery, and when I put one in it, it wouldn't start. 2 days later I found out someone cut the green ignition wire under the steering column.

I twisted the wires back together and turned the key and it fire right up. It was loud, but sounded great. It has a custom exhaust that reroutes it from the back out to the side. It also had a magnaflow unit. The car was fast, it went 85 mph from starting at one main street to the next, which in my town that isn't very far. It burnt rubber real well when I powerbraked it in low 1 gear.

The car is a great competitor for the G-Body class. I will never forget all the gas money spent along with great memories every Friday night at the track. I am 17 years old and this was my first car. I lost it 2 months ago because I went to jail at court and it got towed away. If anyone knows where I can get another 86 Cutlass project, I would really appreciate it.

Tristan Hoppock, Wichita KS, United States midwest.

24th Apr 2010, 01:37

I just purchased an 87 Regal T Limited with a 307. It has 60k miles for 3500. Man it's clean, a dream come true, it runs really smooth, not a lot of power, but really nice to drive.

4th May 2010, 23:02

I've been saving up for an automatic 84 2 door sedan white Cutlass Supreme Brougham with 20,000 miles. It has some really old torn up back seats covered with a blanket in it that I want to replace, but other than that, it's all good. I just bought a speaker box that I'm gonna drop in the trunk. Sounds like it's gonna be a nice drive.

22nd Mar 2011, 22:11

I myself have a 83 Cutlass Supreme with a Chevy 350 that works well with a TH turbo trans. All I had to do was move the Chevy motor mounts all the way to the front.

Look me up on YouTube just for gigs.

27th Sep 2011, 13:11

It all depends on the motor and tranny that are currently in the car. I have an 84 Cutlass with a 350 and TH350 tranny, and it works great.

28th Sep 2015, 19:10

What frame mounts did you use, and is there a way you can tell me which holes in the frame I'm supposed to use?

13th Dec 2016, 08:47

What's best for no horsepower and gas saver motor for a 1986 Cutlass Supreme Brougham??? I'm trying to downsize from a 350 beast!!