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The Oldsmobile 425 Rocket and Pontiac 389 are different V8 engine families from different GM divisions—not two versions of the same engine. Their displacement, specifications, and application-specific power ratings differ, and the published figures available here do not make them a controlled, head-to-head performance comparison.
How the Oldsmobile 425 and Pontiac 389 differ
| Comparison | Oldsmobile 425 Rocket V8 | Pontiac 389 V8 |
|---|---|---|
| Engine family | Oldsmobile 425 V8; the cited technical table includes 1966 and 1967 entries. | Pontiac 389 CID V8; General Motors identifies it in the 1964 GTO. |
| Displacement | 425 cubic inches. | 389 cubic inches. |
| Bore × stroke | 4.125 × 3.975 inches, according to the OLDSmobility technical table. | Not stated in the cited sources. |
| Example output ratings | For 1966, the OLDSmobility table lists a 2-barrel version at 310 hp at 4,400 rpm and 450 lb-ft at 2,400 rpm. Its 4-barrel entries include 365 hp at 4,800 rpm and 470 lb-ft at 3,200 rpm, and a 375-hp entry with the same listed torque and rpm. | For the 1964 GTO, GM Heritage describes a 325-hp 389 and an optional Tri-Power version rated at 348 hp. The page does not state torque. |
These figures come from different model years and applications: a 1966 Oldsmobile specification table and GM’s description of the 1964 GTO. They should not be read as results from a same-year, same-vehicle test. GM describes the GTO package as including “the high performance 389 CID V8, dual exhausts, special GTO nameplates, simulated engine-turned dash panel inserts and dual hood scoops” (GM Heritage’s 1964 Pontiac GTO page). The Oldsmobile figures are from OLDSmobility’s engine specification table.
Why the horsepower numbers are not a direct verdict
The listed Oldsmobile outputs vary by carburetor and configuration; the Pontiac figures refer to two different 1964 GTO configurations. The sources do not establish a matched test basis across the engines. Comparing one rating from each therefore cannot show that one engine is categorically faster or stronger.
A meaningful comparison of a particular pair would require the year and engine code, carburetor, compression ratio, camshaft, exhaust, and rating convention for each engine. For a vehicle-level performance comparison, vehicle weight, transmission, and gearing also matter. The cited material does not provide those matched details or establish a universal winner for speed, strength, buildability, or reliability.
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LISEN Retractable Car Charger, 84W Car Charger USB C Fast Charge,4 in 1
- Never Let a Dead Battery Ruin Your Drive. The LISEN 4 in 1 Retractable Car Charger delivers reliable power for your entire journey. Compatible with standard 12V cigarette lighter sockets, it keeps phones, tablets, and devices charged during daily commutes, road trips, and long drives — the perfect practical gift for dads, truck drivers, and anyone who lives on the road.
- Daily Driver Essential: Always Ready When You Need It. Featuring two retractable cables ( USB C & Old iPhone Charging Cable ) that extend up to 31.5 inches and dual USB ports, this charger solves cable clutter while charging up to 4 devices simultaneously. Ideal for busy fathers, commuters, and families who want a tidy car and never worry about low battery again.
- Deliver full-speed PD fast charging for iPhone 18 Pro Max & iPhone 18 Pro Max & iPhone 18 Pro right inside your car. The built-in 45W PD USB-C port hits the peak charging speed for these latest iPhone models, juicing up your phone to 50% power in just 15 minutes while you drive.(Note: Maximum 45W PD output is available under 24V vehicle power supply. When used with standard 12V car sockets, the peak output is limited to 36W.)
- Standard 12V Power Solution: Designed as a dedicated USB power supply for charging devices. Note: Does NOT support CarPlay, Bluetooth, or data transfer. Compatible with most phones, tablets, and small electronics. This retractable charger is a core car organization tool, keeping your vehicle tidy. Not compatible with Micro-USB devices.
- Clutter-Free Tech Organization: Featuring dual USB ports and retractable cables, the LISEN 4 in 1 charger provides a clean car storage solution. Perfect for truck enthusiasts or as a thoughtful gift for drivers, it supports fast USB-C charging for devices like the iPhone 18Pro & iPhone 18 ProMax. Keep your vehicle organized while ensuring efficient power delivery for all your tech on the road.
Which engine makes more sense for your project?
Choose based on the car and the job, not displacement or a single horsepower figure. These checks help narrow the decision:
- Originality: For a restoration, establish which engine is correct for the target car and its specific year and configuration.
- Identity and condition: Verify the exact engine code and assess the condition of the engine you can actually obtain.
- Configuration: Compare year-specific ratings and equipment, rather than treating every 425 or 389 as identical.
- Service information and parts: Use documentation and components for the correct engine family and application. A documented Oldsmobile 330/425 service-manual listing is available through Manualzz; it does not establish that a current copy is for sale. The Sealed Power catalog documents valve components for a Pontiac 389 OHV application, not Oldsmobile 425 fitment. Check the year and application before selecting parts.
- Whole-car combination: Match the engine to the intended use, transmission, gearing, and vehicle rather than assuming the highest published rating will deliver the best result.
Do not assume the engines or their parts interchange
Both are GM V8s, but that alone does not establish shared design or bolt-in compatibility. The service information cited for Oldsmobile covers Oldsmobile 330/425 V8 engines, while the cited replacement-component catalog identifies a Pontiac 389 application. Treat each as a separate family and verify fitment for the exact engine and vehicle; do not select Pontiac parts for an Oldsmobile 425, or the reverse, based only on displacement or manufacturer.
Rank #2
SINGARO Car Cup Holder Coaster, Silicone Cup Holder Insert, Universal Non-Slip Cup Holders, Car Accessories Interior for Women and Man Interior Sets 4 Pack Black
- High Quality Material: The coaster is made of environmentally friendly silicone, safe, non-toxic and odorless. Soft with toughness, easily embedded in the cup holder. Very durable, wear-resistant, long service life. High temperature resistance, can withstand 100 ℃ high temperature water cups.
- Wide Compatibility: The coaster has a diameter of 3.15 inches and a height of 1.18 inches, which is widely used in most vehicles, such as SUV, sedan, MPV, etc., as long as the size fits your car cup holder.
- Protection Function: Our car cup holder coaster has a carry handle design and a stand-up ring edge on its edge to effectively prevent food crumbs, drinks and water from leaking out and preventing the car cup holder from getting dirty.Meanwhile,Thickened design effectively prevents the cup holder from being scratched by the cup when driving on bumpy roads and eliminates the annoying thumping sound, making your journey more enjoyable.
- Easy to Use and Clean: With embedded installation, you just need to put it flat on the car cupholder. It is also very quick to remove, there is a small bump on the coaster, pinch it and you can easily remove the coaster. It is very easy to clean, rinse with water or wipe with a wet towel (be careful not to clean with sharp tools).
- 100% Satisfaction: Our products have quality assurance, if you have questions or are not satisfied after receiving the product, don't worry, please contact us as soon as possible, we provide after-sales service.
What the available specifications do—and do not—establish
The sources establish the engines’ separate identities, the Oldsmobile 425’s listed bore and stroke, and selected output ratings for particular configurations. They do not provide matching test conditions, a complete specification set for both engines, or evidence for a universal performance or reliability ranking. The right answer depends on the specific engine and project.
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Stacool Upgraded Car Center Console Cover,Microfiber Leather Car Armrest Cover Cushion with 2 Storage Bags,Universal Car Armrest Storage Box (Black)
- 🔰 UPGRADED SIDE STORAGE DESIGN - Our console cover is thinner than the old one, universal for all seasons. There is an 8.66*5.12 inch storage pocket design on each left and right side, expanding the storage space, convenient and practical. Meet the storage needs of the main passenger seat, you can store your cell phone, keys, tissues, ID and some other small daily items.
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- 🔰 RELIEVE DRIVING FATIGUE - The arm rest cover for car adopts ergonomic design, giving just the right amount of arm support, effectively dispersing elbow pressure and relieving driving fatigue. Protect your car's center console from getting dirty or scratched. Especially suitable for long time driving or long distance traveling, bringing you a new experience of relaxation and comfort!
- 🔰 NON-DESTRUCTIVE INSTALLATION - This car console cover is designed with an elastic band for a firm fit and not easy to shake. And the back side is full of protruding dots, which can effectively avoid the armrest cover from slipping and shifting. All you need to do is to open the center console cover, put the elastic band directly into the cover and then close it.
- 🔰 BUYER'S GUIDE - You will receive a car armrest storage box with the size of 12.13*7.80 inch, please measure the size of your car's armrest storage box before you buy. We have prepared five simple and beautiful colors for you, you can choose according to your own preferences. Suitable for most of the vehicles on the market, such as car, truck, SUV, RV, van, etc.
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YGDMD 2PCS Car Seat Gap Filler Organizer,2 in 1 Car Gap Filler (Black)
- Buyer's Guide: The seat guard for car seat between seat & console measures 15.75*2.7*1.53", suitable for gaps of 1.43-1.53" in width, please double-check carefully the distance between your seat and the center console before placing an order
- Storage and Filling in One: Differ from traditional single-function gap fillers, gap filler for car incorporates storage function, offers you the convenience of storing phones and various other items, so that you can access them at any time while driving
- Avoid Items Slipping: With the bumps and vibrations of the car, phones, keys may fall into the seat crevices, which is difficult to pick up, and distracts the driver's attention. Car gap seat filler fills gaps seamlessly to create an effective barrier
- Easy to Install: Car side seat gap filler is easy to install, simply insert it into the gap between the seat and the center console, gap seat filler for car can fit tightly without affecting the normal adjustment of the seat and the use of the seat belt
- Premium Material: Crafted from premium EVA material, our car seat side gap filler boasts a combination of wear-resistant, softness&durability. Maintenance is effortless, simply rinse and wipe to quickly clean the dust and debris in corners and crevices
Rank #3
Kaistyle for Magsafe Car Mount【Strong Magnet】 Magnetic Phone Holder for Car Phone Holder Mount Dash Mounted Holders Phone Holders for Your Car Accessories for Women Men for iPhone 18 Pro Max 17 16 15
- ✅【Designed for Magsafe】 - The most fashionable iphone car mount in 2026 Magsafe is designed for iPhone 18 Pro Max/17/16/15/14/13/12 Pro Max Mini and official Magsafe cases and other magnetic phone cases and can be fixed directly to these phones without the need to affix metal plates. All Android Phones Will Work: Metal rings are provided; they fit cases and other phones without magsafe. Based on Unique Grandmaster Design (Protected by US Design Patent No. US D1,112,194 S)
- ✅【STRONG MAGNETIC MagSafe Car Mount】 - This powerful magnetic phone holder can create a powerful attraction that firmly supports your device while allowing you to drive without distraction. it easily and securely holds your phone through bumps, sharp turns or even sudden stops, no worrying of dropping your phone.
- ✅【SUPER STICK FORCE】 - VHB Dash Mounted Holders adhesive provides strong stick force between the dashboard and the car phone holder, which can firmly stick to any plane in the car, fix your device, adapt to a variety of road conditions such as sudden braking, speed bump, and rugged mountain road.
- ✅【SAFE DRIVING VIEW】 - Mini-size, not taking up space, it is placed in the dashboard without blocking the view at all, and does not need to look down at the device to ensure your safe driving. Cell Phone Car Mount is suitable for most cars, pickups, SUV, taxi; It is the best assistant for Uber and Lyft drivers
- ✅【360° FREE ROTATION】 - With an adjustable swivel ball joint, you can rotate your smartphone or device at your own will, providing the best viewing angle. Quickly pick and place with one hand, free your hands and make calls and GPS navigation more convenient
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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