Sifting through countless of stocks in the Automobile Components industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Dorman Products, Inc. or Aptiv PLC because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Dorman Products, Inc. and Aptiv PLC compare based on key financial metrics to determine which better meets your investment needs.

About Dorman Products, Inc. and Aptiv PLC

Dorman Products, Inc. supplies replacement and upgrade parts for the motor vehicle aftermarket industry in the United States and internationally. It operates through segments Light Duty, Heavy Duty, and Specialty Vehicle segments. The company offers engine products, including intake and exhaust manifolds, oil filters and coolers, fans, thermostat housings, and throttle bodies; undercar products, such as fluid lines, fluid reservoirs, connectors, 4-wheel drive components and axles, drain plugs, other engine, transmission, and axle components; steering and suspension products comprising control arms, ball joints, tie-rod ends, brake hardware and hydraulics, wheel and axle hardware, suspension arms, knuckles, links, bushings, and leaf springs, as well as other suspension, steering, and brake components; body products, including door handles and hinges, window lift motors, window regulators, switches and handles, wiper components, lighting, electrical, and other interior and exterior vehicle body components, including windshields for UTVs; electronics products, such as new and remanufactured modules, clusters and sensors; and hardware products consisting of threaded bolts and auto body fasteners, automotive and home electrical wiring components, and other hardware assortments and merchandise. It also provides OE FIX solutions, including exhaust manifolds, metal heater hose connectors, and aluminum oil filter housings; and intake manifolds, exhaust manifolds, oil filters and coolers, exhaust gas recirculation coolers, driveshafts, UTV windshields, and complex electronics modules. The company markets its products under the DORMAN, DORMAN OE FIX, HELP!, Conduct-Tite, Dayton Parts, SuperATV, Keller Performance Products, Assault Industries, Gboost, and GDP brands through aftermarket retailers, dealers, and national, regional, and local wholesale distributors and specialty markets. Dorman Products, Inc. was founded in 1918 and is headquartered in Colmar, Pennsylvania.

Aptiv PLC, an industrial technology company, provides hardware and software solutions to support automotive and other industries in North America, Europe, the Middle East, Africa, the Asia Pacific, and South America. It operates through three segments: Advanced Safety and User Experience, Engineered Components, and Electrical Distribution Systems. The company offers active safety, user experience and smart vehicle compute, and software products for vehicle safety and security, including intelligent sensors, compute platforms, and software tools and services. It also provides connection systems, interconnects, and cable management and protection solutions for the distribution of power, signal, and data. Aptiv PLC was incorporated in 2011 and is based in Schaffhausen, Switzerland.

Latest Automobile Components and Dorman Products, Inc., Aptiv PLC Stock News

As of August 20, 2026, Dorman Products, Inc. had a $3.9 billion market capitalization, compared to the Automobile Components median of $2.7 million. Dorman Products, Inc.’s stock is up 6.6% in 2026, down 3.7% in the previous five trading days and down 15.23% in the past year.

Currently, Dorman Products, Inc.’s price-earnings ratio is 18.2. Dorman Products, Inc.’s trailing 12-month revenue is $2.2 billion with a 10.2% net profit margin. Year-over-year quarterly sales growth most recently was 0.7%. Analysts expect adjusted earnings to reach $8.665 per share for the current fiscal year. Dorman Products, Inc. does not currently pay a dividend.

As of August 20, 2026, Aptiv PLC had a $9.8 billion market cap, putting it in the 77th percentile of all stocks. Aptiv PLC’s stock is down 38.2% in 2026, down 5.1% in the previous five trading days and down 38.23% in the past year.

Currently, Aptiv PLC’s price-earnings ratio is 21.4. Aptiv PLC’s trailing 12-month revenue is $20.5 billion with a 1.1% net profit margin. Year-over-year quarterly sales growth most recently was 2.3%. Analysts expect adjusted earnings to reach $5.724 per share for the current fiscal year. Aptiv PLC does not currently pay a dividend.

How We Compare Dorman Products, Inc. and Aptiv PLC Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Dorman Products, Inc. and Aptiv PLC’s stock grades to see how they measure up against one another.

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Dorman Products, Inc. and Aptiv PLC Growth Grades

Company	Ticker	Growth
Dorman Products, Inc.	DORM	A
Aptiv PLC	APTV	A

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Dorman Products, Inc. has a Growth Score of 95, which is Very Strong. Aptiv PLC has a Growth Score of 89, which is Very Strong.

The Growth Grade Winner: It’s a Tie!

Looking at the Growth Grade breakdown above, both Dorman Products, Inc. and Aptiv PLC have a grade of A. For investors who focus solely on a company’s upward growth, further research should be conducted into both companies’ other financial metrics before deciding whether to invest.

Dorman Products, Inc. and Aptiv PLC’s Momentum Grades

Company	Ticker	Momentum
Dorman Products, Inc.	DORM	D
Aptiv PLC	APTV	F

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Dorman Products, Inc. has a Momentum Score of 35, which is Weak. Aptiv PLC has a Momentum Score of 16, which is Very Weak.

The Momentum Stock Winner: No Clear Winner

Neither Dorman Products, Inc. or Aptiv PLC has a strong enough Momentum Grade to be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Dorman Products, Inc. or Aptiv PLC is the better investment when it comes to momentum.

Dorman Products, Inc. and Aptiv PLC’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Dorman Products, Inc.	DORM	B
Aptiv PLC	APTV	C

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

Dorman Products, Inc. has a Earnings Estimate Score of 68, which is Positive. Aptiv PLC has a Earnings Estimate Score of 42, which is Neutral.

The Earnings Estimate Revisions Grade Winner: Dorman Products, Inc.

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, Dorman Products, Inc. has a better Earnings Estimate Revisions Grade than Aptiv PLC. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, Dorman Products, Inc. could be a good stock to invest in. However, it’s important to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Dorman Products, Inc. and Aptiv PLC Grades

In addition to Momentum, Estimate Revisions and Growth, A+ Investor also provides grades for Value and Quality.

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and F-Score.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Dorman Products, Inc. and Aptiv PLC pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Dorman Products, Inc. or Aptiv PLC Stock?

Overall, Dorman Products, Inc. stock has a Growth Score of 95, Momentum Score of 35 and Estimate Revisions Score of 68.

Aptiv PLC stock has a Growth Score of 89, Momentum Score of 16 and Estimate Revisions Score of 42.

Comparing Dorman Products, Inc. and Aptiv PLC’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.