What is the difference between a 572 and a 632 Chevy engine?
In short, the 632 is the bigger-displacement version of Chevrolet’s big-block crate engines, offering more torque and horsepower than the 572 (about 9.37 L vs 10.35 L). Exact output depends on configuration, induction, and supporting components.
Chevrolet Performance Parts offers both the 572 and the 632 as crate engines built on the Big-Block Chevy platform, but they serve different goals. The 572 delivers strong, versatile performance suitable for street and strip applications, while the 632 emphasizes maximum displacement-driven power for torque-heavy builds. The exact specs—such as compression ratio, fuel system, induction type (carbureted or EFI), and internal components—vary by package and model year, so it’s important to consult the latest GMPP catalogs for precise numbers. The overview below explains the core differences, practical implications, and how to choose between them.
Displacement and size
The most obvious difference is displacement. The 572 provides 572 cubic inches of displacement (about 9.37 liters), while the 632 yields 632 cubic inches (about 10.35 liters), which is 60 cubic inches more air and fuel the engine can burn per combustion cycle over eight cylinders.
- Displacement: 572 cu in (≈9.37 L) vs 632 cu in (≈10.35 L).
- Power potential generally increases with displacement due to greater air/power intake capability.
- Physical footprint and weight: the 632 is typically heavier and may require more clearance, cooling, and drivetrain considerations.
- Induction options: both are offered with carbureted or modern EFI setups in GMPP catalogs; choice affects power curves and driveability.
- Design implications: the 632 uses different bore/stroke strategies and internal components to reach the larger displacement, influencing reliability and service needs.
In practical terms, the bigger displacement of the 632 often translates to more torque at lower RPM and a higher ceiling for power with the right fueling and induction, but it also brings additional packaging and cost considerations.
Performance and drivability
Performance differences stem from how each engine is engineered to use its displacement. The 572 is renowned for strong street manners and broad usability, delivering robust power across a wide RPM range. The 632 is designed to maximize power by virtue of greater displacement, which typically means more torque on tap and higher peak output when properly fueled and tuned. Exact horsepower/torque figures depend on compression, cylinder heads, cam choice, intake, exhaust, and whether a carburetor or EFI setup is used.
- Power range: both are high-performance options, but the 632 often targets higher peak output thanks to its larger displacement.
- Torque curve: expect more low-end to mid-range torque from the 632, with potential for higher peak torque given suitable components.
- RPM envelope: both engines are built for performance; rpm limits depend on cam, valvetrain, and induction configuration. Neither is typically aimed at very high-rev street use, but tuning can shift the usable range.
- Durability considerations: greater displacement can demand improved cooling, stronger drivetrain components, and careful packaging in the chassis.
Choosing between them often comes down to your targets: if you want maximum torque and top-end power for a drag-focused or extreme-performance build, the 632 is the compelling option. If you want a potent, versatile crate engine that blends street comfort with strong acceleration and easier fitment, the 572 remains a very solid choice.
Choosing between them: practical considerations
To help you decide, consider these factors and how they align with your project goals:
- Application: street-driven cars, drag cars, or show cars may benefit differently from the two depending on desired torque and power delivery.
- Vehicle and drivetrain compatibility: heavier displacement requires adequate cooling, transmission/drive shaft strength, and correct engine mounts and clearance.
- Budget and installation: the 632 often carries a higher price tag and may require additional supporting components for optimal performance.
- Induction and fuel strategy: carbureted vs EFI setups affect throttle response, fuel economy, and tuning complexity.
- Support and documentation: consult the latest GM Performance Parts catalogs for exact specs, recommended components, and installation notes.
Bottom line: the 632 is the larger, more power-focused option, while the 572 offers a balanced, highly adaptable platform that still delivers outstanding performance. Your choice should reflect the vehicle, intended use, and the level of hardware and budget you’re willing to commit to the build.
Summary
The 632 and 572 are both high-performance Chevrolet big-block crate engines, with the key difference being displacement: 632 cu in (≈10.35 L) versus 572 cu in (≈9.37 L). The extra displacement in the 632 typically enables more torque and higher peak power, but it also adds weight, packaging challenges, and cost. The 572 remains a versatile, user-friendly option for street/strip applications, while the 632 targets enthusiasts seeking maximum displacement-derived output. For exact specifications, recommended configurations, and current options, consult the latest Chevrolet Performance Parts catalog or official GMPP resources.
