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 PHINIA 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 PHINIA Inc. and Aptiv PLC compare based on key financial metrics to determine which better meets your investment needs.

About PHINIA Inc. and Aptiv PLC

PHINIA Inc. engages in the development, design, and manufacture of integrated components and systems. The company operates through Fuel Systems and Aftermarket segments. The Fuel Systems segment provides advanced fuel injection systems, including pumps, injectors, fuel rail assemblies, and engine control modules; fuel delivery modules; canisters; sensors; and electronic control modules. This segment also offers complete systems comprising software and calibration services that reduce emissions and enhance fuel economy for traditional and hybrid applications. The Aftermarket segment engages in the provision of maintenance, test equipment, and vehicle diagnostics solutions; original equipment service solutions and remanufactured products; and sale of sale of starters and alternators to original equipment manufacturers. Its products are used for commercial vehicles and industrial applications, such as medium-duty and heavy-duty trucks, buses and other off-highway construction, marine, agricultural and aerospace and defense applications; light commercial vehicles comprising vans and trucks; and light passenger vehicles, including passenger cars, mini-vans, cross-overs and sport-utility vehicles. PHINIA Inc. was incorporated in 2023 and is based in Auburn Hills, Michigan.

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 PHINIA Inc., Aptiv PLC Stock News

As of August 20, 2026, PHINIA Inc. had a $2.6 billion market capitalization, compared to the Automobile Components median of $2.7 million. PHINIA Inc.’s stock is up 14.9% in 2026, down 3.3% in the previous five trading days and up 28.85% in the past year.

Currently, PHINIA Inc.’s price-earnings ratio is 20.6. PHINIA Inc.’s trailing 12-month revenue is $3.6 billion with a 3.7% net profit margin. Year-over-year quarterly sales growth most recently was 5.6%. Analysts expect adjusted earnings to reach $5.965 per share for the current fiscal year. PHINIA Inc. currently has a 1.7% dividend yield.

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 37.6% in 2026, down 4.3% 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 PHINIA 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 PHINIA Inc. and Aptiv PLC’s stock grades to see how they measure up against one another.

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PHINIA Inc. and Aptiv PLC Stock Value Grades

Company	Ticker	Value
PHINIA Inc.	PHIN	B
Aptiv PLC	APTV	B

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 Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

PHINIA Inc. has a Value Score of 80, which is Value. Aptiv PLC has a Value Score of 79, which is Value.

The Value Stock Winner: It’s a Tie!

Looking at the Value Grade breakdown above, both PHINIA Inc. and Aptiv PLC have a Value Grade of B. For investors who focus solely on a company’s valuation, you will need to conduct further research into both of these companies’ other metrics to see if they could be good additions to your portfolio. It’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

PHINIA Inc. and Aptiv PLC’s Quality Grades

Company	Ticker	Quality
PHINIA Inc.	PHIN	A
Aptiv PLC	APTV	A

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks 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 the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

PHINIA Inc. has a Quality Score of 86, which is Very Strong. Aptiv PLC has a Quality Score of 93, which is Very Strong.

The Quality Grade Winner: It’s a Tie!

Looking at the Quality Grade breakdown above, both PHINIA Inc. and Aptiv PLC have a grade of A. For investors who focus solely on a company’s overall quality, you will need to conduct further research into both companies to see if they are a good fit for your portfolio. As a good rule of thumb, you should always analyze multiple factors based on a wide range of metrics before choosing a company to invest in.

PHINIA Inc. and Aptiv PLC’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
PHINIA Inc.	PHIN	D
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.

PHINIA Inc. has a Earnings Estimate Score of 30, which is Negative. Aptiv PLC has a Earnings Estimate Score of 42, which is Neutral.

The Earnings Estimate Revisions Stock Winner: No Clear Winner

Neither PHINIA Inc. or Aptiv PLC has an Earnings Estimate Revisions Grade that could 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 PHINIA Inc. or Aptiv PLC is the better investment when it comes to estimate revisions.

Other PHINIA Inc. and Aptiv PLC Grades

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

Momentum grades help 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.

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

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 PHINIA 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, PHINIA Inc. or Aptiv PLC Stock?

Overall, PHINIA Inc. stock has a Value Score of 80, Estimate Revisions Score of 30 and Quality Score of 86.

Aptiv PLC stock has a Value Score of 79, Estimate Revisions Score of 42 and Quality Score of 93.

Comparing PHINIA 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.