5.7 Hemi vs 5.3 Vortec | In-Depth Differences Explained in Table

The new Dodge Charger offers a choice between two engines. The base Charger has a 5.7-litre V8 producing 292 horsepower and 295 lbf of torque that comes paired to an 8-speed automatic transmission in all but the R/T variant. If you can’t live without your V8, the Charger SRT Hellcat is available with a supercharged 6.2-litre V8 making 707 horsepower and 650 lbf of torque paired to an 8-speed automatic transmission. Both engine options are vastly different, and we’ll look at the differences so you can make the right choice for yourself. Here is the guide on 5.7 Hemi vs 5.3 Vortec.

The following review will highlight both engine options’ overview and their differences and comparisons against other rivals in the segment like Ford Mustang, Chevrolet Camaro SS, Hyundai Genesis Coupe 3.8 and Subaru BRZ.

5.7 Hemi Overview

The Hemi engine family originally gave the 5.7-liter Hemi engine a fresh start. The Hemi engine was originally available from the 1950s until the 1970s, but the 5.7L Hemi marked its return to the market.

The combustion chamber and cylinder heads were built, giving rise to the so-called Hemi. Less heat is lost due to inefficient combustion attributed to the semicircular shape. Even while other manufacturers also employ the Hemi design or a smaller derivative, the marketing designation Hemi only applies to an engine made by Chrysler.

It was originally manufactured primarily for NASCAR racing purposes but was later made available in road cars. The customer cars this engine was available were mainly Dodge and Plymouth cars.

Before Dodge, it was available for the Coronet, Charger, Dart, Super Bee and Challenger.

Performance and specifications of 5.7L Hemi

The HEMI engine is a semicircular internal combustion engine, Chrysler’s first trademark in the 1960s, and today a drag strip worth seeing in rides, such as the Dodge Challenger SRT Demon, a modern muscle car. HEMI is also a trademark and designates the Chrysler HEMI range of in-line six-cylinder and V8 engines.

The HEMI engine usually (but not always) has cylinders with a domed head (instead of a traditional flat head) and a semicircular combustion chamber.

The Hemi 5.7 l’s initial model from 2003 had a rated power that perfectly matched the output in cubic inches, 345. It was also typical for the first Hemi models to have a horsepower-to-cubic inch ratio of one to one. The computation uses horsepower before changing. The 5.7L engine’s peak torque in 2003 was 375 lbf-ft. at 4400 rpm.

Performance has greatly improved as a result of 2009 updates, including the VCT that was previously addressed as well as other modifications like a constant volume, better airflow, and an innovative air handling unit. The model produced up to 390 hp and 407 lbf-ft of torque. The bore and stroke of this engine were each 3.92 inches.

Construction of the top and wall

Cast iron serves as the engine block, and aluminium serves as the cylinder head in the Hemi. Plastic is used to make the suction pipe. To boost strength, the pistons also employ an alloy eutectic design.

There are two ducts per barrel in a block configuration with a camshaft and push rod as the valve train. Only rings per piston are feasible due to the engine’s semicircular design; however, this allows for larger inflow and carburettor, which eventually boosts airflow. Beehive-style valve springs allow for less spring weight.

This machine features a number of the latest gadget as well as an effective semicircular chamber shape. 

Overview 5.3 Vortec

5.3 Vortec, also called LM7, has been implemented in many cars. The engine has been fitted and moved many vehicles from trucks, tractors and trucks to performance cars such as the Chivvies and Corvette.

The 5.3-liter Vortec engine was originally designed and manufactured by General Motors in the new heavy-duty automotive industry. The small block of aluminium frames the engine with V8 maneuvers. After the success of this particular model, many other LS engines were designed after the 5.3-litre engine.

The 5.3L series originally had nine varieties, divided into Gen III and Gen IV subcategories. While performance and performance are similar, there are still fundamental differences between generations, such as differences in fuel economy and efficiency and other parameters.

It produces 270 horsepower and 315 lbf-ft. of torque. Before the Gen III engine design was phased out from the 5.3-liter Vortec, the L33, sold as a high-performance version, reached 310 horsepower and 335 lbf-ft. Of torque.

5.3 L Vortec is a long-standing motorcycle that is constantly gaining in popularity. This engine is available in many applications for larger SUVs and trucks, and many comments on the service life have been recorded so far.

The performance does not match the performance of the closely matched engines in the LS family. The engine is designed for trucks and SUVs, focusing on heavier weight than LS engines. Some engine variants can be supplied with an aluminium head and block, but many still use a cast iron block, especially in large trucks.

5.7 Hemi vs 5.3 Vortec | Tabular Differences

Let’s take a closer look at their basic components and distinguish them according to their qualities.

Specifications	5.3 Vortec	5.7 Hemi
Horsepower	Horse Power “270 HP”	390 horsepower
Torque	Torque 315 lbf-ft.	407 lbf-ft. of torque.
Weight	385 pound	560 lbs.
Maximum Torque	torque measurement of 375 lbf-ft.at 4400 RPM	410 lbf-ft.at 3,950 – 4,400 RPM
Bore	3.8 inches	3.92 inches
Stroke	3.6 inches	3.58 inches
Valve distribution	SOHC rod V8, two valves per cylinder	Camshaft push rod in a block system with 2 valves per cylinder
Maximum HP	503 hp at 6,600 RPM	395 HP at 5,600 RPM
Maximum Torque	Torque 441 lbf-ft.at 5,700 RPM	410 lbf-ft.at 3,950 – 4,400 rpm

Frequently Asked Questions

How powerful is the Ford Vortec engine?

However, the Vortec was a powerful engine with excellent power producing 255 horsepower at one rpm and torque of 4600 and 330 feet/pound. The maximum and minimum compression ratio was somewhere between 9.4 and 1.

Which engine is better, 5.3 or 5.7 Hemi?

The 5.7-liter Hemi V8 in the Ram is better on paper than the 5.3-liter V8 in the Chevy. The Hemi has 395 horsepower and 410 lbf-ft. of torque, while the comparable and affordable Chevy V8 provides 355 horsepower and 383 lbf-ft. of torque.

Do Hemi engines need premium gas?

If you have a HEMI V8 engine, you must use the 89 octane number. If you have a basic V6 engine, then it is ok to use 87. Never use a value higher than 89

Is the Vortec 5.3 a good bike?

The 5.3L V8 Vortec 5300 is considered an extremely reliable engine. Many motor vehicle owners report that the engine has travelled up to 220,000 miles with minimal problems.

How much horsepower can Vortec earn?

Atmospheric 5.3 L eventually produced 503 horsepower at 6600 rpm and torque 441 lbf-ft.at 5700 rpm.

Conclusion

The most important part of the vehicle is the engine. A car’s performance, comfort and durability depend highly on the engine. Yes, both engines achieve a high level of reliability. The final decision, therefore, depends on individual preferences. Hope this guide on 5.7 hemi vs 5.3 vortec helped you.

Expert Opinion

On paper, the 5.7-liter Hemi V8 in the Ram is better than the 5.3-liter V8 in the Chevy. The Hemi makes 395 hp and 410 lbf-ft. of torque, while the Chevy’s similarly sized and priced V8 makes 355 hp and 383 lbf-ft. of torque”.

References

• https://www.motoraudit.com/5-3-vs-5-7-vortec-engine
• https://chevycarblog.com/2020-5-7-hemi-vs-5-3-vortec
• https://www.youtube.com/watch?v=BRkQl7LzIIE
• http://www.automotiveforums.com/t318250-discuss5_7_hemi_v_s_5_3_vortec.html
• http://www.automotiveforums.com/t318250-3_discuss5_7_hemi_v_s_5_3_vortec.html
• https://www.dodgetalk.com/threads/hemi-vs-vortec-5-3.23744